Method and device for uplink power control

ABSTRACT

The present disclosure relates to a communication method and system for converging a 5 th -Generation (5G) communication system for supporting higher data rates beyond a 4 th -Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. The present disclosure provides a method for uplink power control, which is applied to a User Equipment (UE), and the method includes: determining a timing between a power control command and a Physical Uplink Control Channel (PUCCH), which adopts the power control command to control power. The present disclosure also provides a corresponding device.

CROSS-REFERENCE TO RELATED APPLICATION(S)

This application is a continuation application of prior application Ser.No. 17/140,591, filed on Jan. 4, 2021, which is a continuationapplication of prior application Ser. No. 16/605,707, filed on Oct. 16,2019, which has issued as U.S. Pat. No. 10,887,842 on Jan. 5, 2021,which is a U.S. National Stage application under 35 U.S.C. § 371 of anInternational application number PCT/KR2018/004461, filed on Apr. 17,2018, which is based on and claims priority under 35 U.S.C. § 119(a) ofa Chinese patent application number 201710250358.3, filed on Apr. 17,2017, in the China National Intellectual Property Administration, of aChinese patent application number 201710348787.4, filed on May 17, 2017,in the China National Intellectual Property Administration, of a Chinesepatent application number 201710516144.6, filed on Jun. 29, 2017, in theChina National Intellectual Property Administration, of a Chinese patentapplication number 201710532281.9, filed on Jul. 3, 2017, in the ChinaNational Intellectual Property Administration, of a Chinese patentapplication number 201710640300.X, filed on Jul. 31, 2017, in the ChinaNational Intellectual Property Administration, of a Chinese patentapplication number 201710713211.3, filed on Aug. 18, 2017, in the ChinaNational Intellectual Property Administration, of a Chinese patentapplication number 201710773402.9, filed on Aug. 31, 2017, in the ChinaNational Intellectual Property Administration, of a Chinese patentapplication number 201711140695.3, filed on Nov. 16, 2017, in the ChinaNational Intellectual Property Administration, and of a Chinese patentapplication number 201810031000.6, filed on Jan. 12, 2018, in the ChinaNational Intellectual Property Administration, the disclosure of each ofwhich is incorporated by reference herein in its entirety.

TECHNICAL FIELD

The present disclosure relates to wireless communication technologies,and more particularly, to a method and a device for uplink powercontrol, to a method and a user equipment (UE) for transmitting uplinkcontrol information (UCI), to a method and a UE of bandwidth part (BWP)switching, to a method and apparatus for measuring cell, a method andapparatus for handover, to a method and a device for reporting ChannelState Information (CSI).

BACKGROUND ART

To meet the demand for wireless data traffic having increased sincedeployment of 4G communication systems, efforts have been made todevelop an improved 5G or pre-5G communication system. Therefore, the 5Gor pre-5G communication system is also called a ‘Beyond 4G Network’ or a‘Post LTE System’. The 5G communication system is considered to beimplemented in higher frequency (mmWave) bands, e.g., 60 GHz bands, soas to accomplish higher data rates. To decrease propagation loss of theradio waves and increase the transmission distance, the beamforming,massive multiple-input multiple-output (MIMO), Full Dimensional MIMO(FD-MIMO), array antenna, an analog beam forming, large scale antennatechniques are discussed in 5G communication systems. In addition, in 5Gcommunication systems, development for system network improvement isunder way based on advanced small cells, cloud Radio Access Networks(RANs), ultra-dense networks, device-to-device (D2D) communication,wireless backhaul, moving network, cooperative communication,Coordinated Multi-Points (CoMP), reception-end interference cancellationand the like. In the 5G system, Hybrid FSK and QAM Modulation (FQAM) andsliding window superposition coding (SWSC) as an advanced codingmodulation (ACM), and filter bank multi carrier (FBMC), non-orthogonalmultiple access (NOMA), and sparse code multiple access (SCMA) as anadvanced access technology have been developed.

The Internet, which is a human centered connectivity network wherehumans generate and consume information, is now evolving to the Internetof Things (IoT) where distributed entities, such as things, exchange andprocess information without human intervention. The Internet ofEverything (IoE), which is a combination of the IoT technology and theBig Data processing technology through connection with a cloud server,has emerged. As technology elements, such as “sensing technology”“wired/wireless communication and network infrastructure” “serviceinterface technology”, and “Security technology” have been demanded forIoT implementation, a sensor network, a Machine-to-Machine (M2M)communication, Machine Type Communication (MTC), and so forth have beenrecently researched. Such an IoT environment may provide intelligentInternet technology services that create a new value to human life bycollecting and analyzing data generated among connected things. IoT maybe applied to a variety of fields including smart home, smart building,smart city, smart car or connected cars, smart grid, health care, smartappliances and advanced medical services through convergence andcombination between existing Information Technology (IT) and variousindustrial applications.

In line with this, various attempts have been made to apply 5Gcommunication systems to IoT networks. For example, technologies such asa sensor network, Machine Type Communication (MTC), andMachine-to-Machine (M2M) communication may be implemented bybeamforming, MIMO, and array antennas. Application of a cloud RadioAccess Network (RAN) as the above-described Big Data processingtechnology may also be considered to be as an example of convergencebetween the 5G technology and the IoT technology.

Long Term Evolution (LTE) technologies support two duplex modes, thatis, Frequency Division Duplex (FDD) and Time Division Duplex (TDD). FIG.1 is a schematic diagram illustrating a frame structure of a TDD systemin the LTE. Length of each wireless frame is 10 ms. A wireless frame isequally divided into two half frames, length of which is 5 ms. Each halfframe includes 8 time slots of 0.5 ms, and 3 special fields of 1 ms. Thethree special fields are respectively a Downlink pilot time slot(DwPTS), a Guard period (GP) and an Uplink pilot time slot (UpPTS). Eachsubframe consists of two consecutive time slots.

Transmission in the TDD system includes a transmission from a BaseStation (BS) to a User Equipment (UE) (which is referred to asdownlink), and a transmission from a UE to a BS (which is referred to asuplink). On the basis of the frame structure shown in FIG. 1 , 10subframes are shared by uplink and downlink every 10 ms. Each subframeis configured for the uplink or downlink. A subframe configured for theuplink is referred to as an uplink subframe. A subframe configured forthe downlink is referred to as a downlink subframe. The TDD systemsupports 7 kinds of uplink and downlink configurations. As shown inTable 1, D represents a downlink subframe, U represents an uplinksubframe, and S represents foregoing special subframe including threespecial fields.

TABLE 1 configuration conversion subframe index number point cycle 0 1 23 4 5 6 7 8 9 0  5 ms D S U U U D S U U U 1  5 ms D S U U D D S U U D 2 5 ms D S U D D D S U D D 3 10 ms D S U U U D D D D D 4 10 ms D S U U DD D D D D 5 10 ms D S U D D D D D D D 6 10 ms D S U U U D S U U D

Hybrid Automatic Repeat request-Acknowledgement (HARQ-ACK) informationof a Physical Downlink Shared Channel (PDSCH) may be transmitted in aPhysical Uplink Shared Channel (PUSCH) or a Physical Uplink ControlChannel (PUCCH). For a timing from PDSCH to PUCCH, assuming that a UEfeeds back HARQ-ACK information in a PUCCH of an uplink subframe n, thePUCCH indicates a PDSCH within a downlink subframe (n−k), or HARQ-ACKreleased by Semi-Persistent Scheduling (SPS). Here, k∈K the value of Kis defined in Table 2. K is a set of M elements {k₀, k₁, . . . k_(M-1)},and is relevant with a subframe number and uplink-downlink TDDconfiguration, which is referred to as a downlink association set. Theelement k is referred to as a downlink association element. In thefollowing contents, a downlink subframe corresponding to the downlinkassociation set is referred to as Bundling Window for short. That is,for all the elements k in K, a set {n−k, k∈K}consists of n−k. In a PUCCHsubframe, one PUCCH resource is allocated for each PDSCH of a downlinksubframe, so as to feed back HARQ-ACK information. For the FDD, M isequal to 1, and k is equal to 4.

TABLE 2 Configuration subframe n number 0 1 2 3 4 5 6 7 8 9 0 — — 6 — 4— — 6 — 4 1 — — 7, 6 4 — — — 7, 6 4 — 2 — — 8, 7, 4, 6 — — — — 8, 7, 4,6 — — 3 — — 7, 6, 11 6, 5 5, 4 — — — — — 4 — — 12, 8, 7, 11 6, 5, 4, 7 —— — — — — 5 — — 13, 12, 9, 8, 7, 5, 4, 11, 6 — — — — — — — 6 — — 7 7 5 —— 7 7 —

On the basis of existing LTE specifications, transmission power of aPUCCH channel in subframe i of a serving cell c is determined based onthe following formula.

${P_{PUCCH}(i)} = {\min{\begin{Bmatrix}{P_{{CMAX},c}(i)} \\\begin{matrix}{P_{0{\_{PUCCH}}} + {PL}_{C} + {h\left( {n_{CQI},n_{HARQ},n_{SR}} \right)} +} \\{{\Delta_{F\_{PUCCH}}(F)} + {\Delta_{TxD}\left( F^{\prime} \right)} + {g(i)}}\end{matrix}\end{Bmatrix}\lbrack{dBm}\rbrack}}$

Definition of each parameter in the formula may refer to chapter 5.1.2.1of version 10.9.0 in specification 36.213 of 3rd Generation PartnershipProject (3GPP), which is described as follows.

P_(CMAX,c)(i) is the maximum transmission power, which is configured forthe serving cell c of the UE;

Δ_(F_PUCCH)(F) is a power offset for a reference format (referenceformat in the LTE is PUCCH format 1a);

Δ_(T×D)(F′) is a parameter related with PUCCH format, and whether toadopt a transmit diversity;

PL_(C) is a link loss;

P_(O_PUCCH) is a power offset value configured by high-layer signaling;

g(i) is an accumulated value of a closed-loop power control;

h(n_(CQI),n_(HARQ),n_(SR)) is a power offset, which is related withPUCCH format and the number of bits of Uplink Control Information (UCI)needing to be fed back. n_(CQI) is the number of bits of Channel StateInformation (CSI) needing to be fed back in subframe i. n_(SR) is thenumber of bits of a Scheduling Request (SR) needing to be fed back insubframe i, value of which is 0 or 1. n_(HARQ) is the number of bits ofvalid HARQ-ACK in subframe i, which are fed back actually. For example,regarding PUCCH format 3, when needing to feed back the CSI,

${h\left( {n_{CQI},n_{HARQ},n_{SR}} \right)} = {\frac{n_{HARQ} + n_{SR} + n_{CQI} - 1}{3}.}$

g(i) is calculated based on formula

${g(i)} = {{g\left( {i - 1} \right)} + {\sum\limits_{m = 0}^{M - 1}{{\delta_{PUCCH}\left( {i - k_{m}} \right)}.}}}$

In the foregoing formula, i is current subframe.

For FDD, M=1, and k₀=4.

For the TDD, M and k_(m) are obtained by using Table 2. For example, foruplink-downlink TDD configuration 1, regarding uplink subframe 2, M isequal to 2, k₀ is equal to 6, k₁ is equal to 7. That is, the PUCCH istransmitted in subframe 2. The PDSCH generating HARQ-ACK is transmittedin subframe (2−6+10=6) and subframe (2−7+10=5). Power control command ofsubframes 5 and 6 of previous radio frame is applied to the PUCCHtransmission of subframe 2 of current radio frame, as shown in FIG. 2 .

δ_(PUCCH) is a power adjustment value, which is obtained based on atransmission power control (TPC) command. The TPC command includes a TPCcommand in Downlink Control Information (DCI) (e.g., DCI format 1A) ofPDCCH, which schedules PDSCH, and a TPC command of DCI (e.g., DCI format3/3A) shared by multiple UEs, which is also referred to as UE-group DCI.A corresponding between the TPC command and the power adjustment valueis shown in Table 3 and Table 4.

TABLE 3 value of TPC command field of DCI format 1A/1B/1D/1/2A/2/3δ_(PUCCH) [dB] 0 −1 1 0 2 1 3 3

TABLE 4 Value of TPC command field of DCI format 3A δ_(PUCCH) [dB] 0 −11 1

Uplink control information (UCI) in long term evolution (LTE) systemcomprises channel state information (CSI), hybrid automaticretransmission request-acknowledgement (HARQ-ACK) and scheduling request(SR). UCI can be transmitted in a physical uplink control channel(PUCCH) or a physical uplink shared channel (PUSCH). When UCI istransmitted on a PUCCH in LTE system, slot-level frequency hopping isused to increase frequency diversity. For example, a PUCCH transmittedin one slot within one subframe and a PUCCH transmitted in another slotwithin the same subframe are symmetrically distributed about a centerfrequency point of an allocated uplink bandwidth in frequency-domain, asshown in FIG. 14 .

Cyclic prefix-orthogonal frequency division multiplexing (CP-OFDM)technology and single carrier-frequency division multiplexing (SC-FDM)technology are introduced in the new radio (NR) air interface of 5thGeneration (5G) Mobile Communication, which means that differentwaveforms may be used for transmitting PUCCH and PUSCH. When differentwaveforms are used for transmitting UCI by a user equipment (UE), goodfrequency diversity gain cannot be obtained if an inappropriatetransmission mode is adopted since different waveforms have differentpeak-to-average power ratios (PAPRs). Therefore, performance of datatransmission may be affected and performance of UCI transmission cannotbe guaranteed.

In view of this, it is desirable to provide a method and UE fortransmitting UCI which can solve the above-described technical problems.

In new radio (NR) air interface systems, a user equipment (UE) mayreceive downlink control signaling and data within a certain bandwidthof a wide frequency-domain spectrum since UE has limitedfrequency-domain processing capabilities and the system bandwidth isrelatively wide. In order to improve the frequency-domain diversityperformances of UEs, a UE may work in different limited frequency bandin different time periods, as shown in FIG. 26 . A limited frequencyband is referred to as a bandwidth part (BWP). A UE may determine theswitching of an active BWP by receiving dynamic signaling, e.g.,receiving downlink (DL) downlink control information (DCI) or uplink(UL) DCI which specifies the switching of an active BWP. For pairedspectrum (e.g., in Frequency Division Multiplexing (FDD)), DL DCI canindicate the switching of a downlink active BWP, and UL DCI can indicatethe switching of an uplink active BWP. For unpaired spectrum (e.g., inTime Division Multiplexing (TDD)), DL DCI or UL DCI can indicate theswitching of a BWP pair which includes a DL active BWP and an UL activeBWP. For example, DL BWP-1 and UL BWP-1 are configured as BWP pair-1, DLBWP-2 and UL BWP-2 are configured as BWP pair-2, and either DL DCI or ULDCI can indicate the switching of the active BWP pair. For example, DLDCI may indicate the active BWP pair switches from BWP pair-1 to BWPpair-2, i.e., the DL active BWP switches from DL BWP-1 to DL BWP-2, andthe UL active BWP switches from UL BWP-1 to UL BWP-2.

A UE can receive a Physical Downlink Control Channel (PDCCH) and aPhysical Downlink Shared Channel (PDSCH) only on the DL active BWP; andcan transmit a Physical Uplink Control Channel (PUCCH) and a PhysicalUplink Shared Channel (PUSCH) only on the UL active BWP. At present, thetiming of the switching of an active BWP at a UE after reception of aDCI indicating the switching of the active BWP is still undetermined.

In view of the above, there is the need of a method and a UE that cansolve the above problem in BWP switching.

The rapid development of information industry, particularly theincreasing demand from the mobile Internet and the Internet of Things(IoT), brings about unprecedented challenges in the future mobilecommunications technology. According to the ITU-R M.[IMT. BEYOND 2020.TRAFFIC] issued by the International Telecommunication Union (ITU), itcan be expected that, by 2020, mobile services traffic will grow nearly1,000 times as compared with that in 2010 (4G era), and the number ofuser device connections will also be over 17 billion, and with a vastnumber of IoT devices gradually expand into the mobile communicationnetwork, the number of connected devices will be even more astonishing.In response to this unprecedented challenge, the communications industryand academia have prepared for 2020s by launching an extensive study ofthe fifth-generation mobile communications technology (5G).

Currently, in ITU-R M.[IMT.VISION] from ITU, the framework and overallobjectives of the future 5G have been discussed, where the demandsoutlook, application scenarios and various important performance indexesof 5G have been described in detail. In terms of new demands in 5G, theITU-R M.[IMT. FUTURE TECHNOLOGY TRENDS] from ITU provides informationrelated to the 5G technology trends, which is intended to addressprominent issues such as significant improvement on system throughput,consistency of the user experience, scalability to support IoT, timedelay, energy efficiency, cost, network flexibility, support foremerging services and flexible spectrum utilization, etc.

Measurement and handover for cell are important steps in a radiocommunication system. When a user equipment (UE) using the networkservice moves from one cell to another cell, or due to adjustment of theload of radio transmission service, activation operation andmaintenance, equipment failure, etc., in order to ensure the continuityof the communication and the quality of service, the system willtransfer the communication link between the UE and the original cell toa new cell. This process is called handover. In order to complete thishandover process, the UE needs to measure the original cell and the newcell and report the measurement result, and the system performs thefinal handover based on the measurement result. As shown in FIG. 48 , ameasurement and handover process for cell in an existing LTE/LTE-A radiocommunication system are shown. The following steps are included in themeasurement and handover process:

Step 1: a base station informs measurement configuration informationincluding an object to be measured by the UE, a neighboring cell list, areport way, a measurement indicator and an event parameter to the UE bythe measConfig cell carried in a Radio Resource Control (RRC) ConnectionReconfiguration message.

Step 2: the UE performs a measurement configuration on a RRC protocolside of the UE according to a measurement control issued by the basestation, and transmits an RRC Connection Reconfiguration Completemessage to the base station to confirm that the measurementconfiguration is completed.

Step 3: the UE measures the cell based on the measurement configurationinformation received in step 1 and common cell-specific referencesignals of the serving cell, and measures the neighboring cellsoptionally based on the measurement configuration information receivedin step 1 and cell-specific reference signals of the neighboring cells,and reports the measurement result to the base station.

Step 4: the base station makes a decision of UE to hand over based onthe measurement result received in step 3 and radio resource managementinformation.

Step 5: the base station determines a suitable target cell and performsthe final handover, if the handover is decided in step 4.

In the existing method for measuring cell and handover, the measurementon the current serving cell and the neighboring cells are all based onthe cell-specific reference signal, which is common to all the UEs inthe same cell. In the future 5G radio communication system, thecell-specific reference signals common to UEs will no longer besupported.

Therefore, the measurement and handover method based on thecell-specific reference signal used in the LTE/LTE-A system can nolonger be applied to the requirements of the future 5G radiocommunication system, and a new measurement and handover method needs tobe designed for the 5G radio communication system to take place of therole of cell-specific reference signal in LTE/LTE-A system.

To enable a Base Station (BS) to learn downlink channel quality, a UserEquipment (UE) transmits a CSI report to the BS. The CSI report includesa periodic CSI report and an aperiodic CSI report. The periodic CSIreport is transmitted, according to a period configured by high-layersignaling and a time offset. The aperiodic CSI report is driven by CSIrequest information, which is carried by Downlink Control Information(DCI) for scheduling a Physical Uplink Shared Channel (PUSCH) by the BS.On the basis of an indication in the CSI request information, the UEtransmits the aperiodic CSI report to the BS of a serving cell. Here,the CSI may include a Channel Quality Indicator (CQI), a PrecodingMatrix Indicator (PMI), a Rank Indicator (RI), and so on.

DISCLOSURE OF INVENTION Technical Problem

In a New Radio (NR), bandwidth of a serving cell may be large. However,a UE's capabilities may only support a part of the whole bandwidth ofthe serving cell, instead of supporting the whole bandwidth of theserving cell. Thus, the UE may be configured with multiple BandwidthParts (BWPs). And, at the same time, there is only one active BWP, andthe remaining BWPs are inactive BWPs. Besides, there may be a differentactive BWP at a different time moment. That is, the active BWP may bechanged at a different time moment, as shown in FIG. 1 . Under thiscircumstances, how to report CSI is a problem to be studied.

Solution to Problem

The present disclosure provides a method and a device for uplink powercontrol, such that power control of PUCCH is more effective.

The present disclosure provides a method for uplink power control, whichis applied to a UE, including:

determining a timing between a power control command and a PhysicalUplink Control Channel (PUCCH), which adopts the power control commandto control power;

on the basis of the determined timing, adjusting transmission power ofthe corresponding PUCCH according to the power control command.

Preferably, the power control command comprises a UE-group power controlcommand, one piece of Downlink Control Information (DCI) transmits atleast one power control command, and each power control command is forone UE;

wherein the method further comprises:

receiving, by the UE, explicit signaling or implicit signaling from aBase Station (BS), or determining, by using a preset method, the timingbetween the UE-group power control command and the PUCCH, which adoptsthe UE-group power control command to control power.

Preferably, receiving the explicit signaling from the BS includes:

transmitting the UE-group power control command in time slot n−k;

transmitting the PUCCH in time slot n, wherein the PUCCH adopts theUE-group power control command to adjust power;

obtaining, by the UE, a value k from the explicit signaling receivedfrom the BS, wherein k is an integer greater than or equal to 0, k of adifferent UE in the same group is the same or different; or,

transmitting the UE-group power control command in time slot n−k;

transmitting the PUCCH in time slot n, wherein the PUCCH adopts theUE-group power control command to adjust power;

obtaining, by the UE, a value k through a combination of the explicitsignaling and physical layer signaling, or though the physical layersignaling, wherein k is an integer greater than or equal to 0.

Preferably, obtaining the value k through the physical layer signalingincludes at least one of:

Mode 1:

a TPC timing set of a different UE transmitting the power controlcommand within the same UE-group DCI being the same; wherein in additionto the power control command of each UE, the DCI of the UE-group powercontrol command further comprises TPC timing indication,

determining, by the UE, a value of the TPC timing set as a time intervalki, according to the TPC timing indication, wherein ki is between theUE-group power control command of the UE and the PUCCH, which adopts theUE-group power control command to adjust power, and the time intervalvalue indicated by the TPC timing indication is applied to all the UEsof the UE-group;

Mode 2:

a TPC timing set of a different UE transmitting the power controlcommand within the same UE-group DCI being different; wherein inaddition to the power control command of each UE, the DCI of theUE-group power control command further comprises the TPC timingindication;

determining, by the UE, a value of a corresponding TPC timing set as atime interval ki, according to the TPC timing indication, wherein ki isbetween the UE-group power control command of the UE and the PUCCH,which adopts the UE-group power control command to adjust power, and thetime interval value indicated by the TPC timing indication is applied toall the UEs of the UE-group;

Mode 3:

a TPC timing set of a different UE transmitting the power controlcommand within the same UE-group DCI being the same, or different;wherein in addition to the power control command of each UE, the DCI ofthe UE-group power control command further comprises one TPC timingindication corresponding to each UE,

determining, by each UE, a value of the corresponding TPC timing set asa time interval ki, according to the TPC timing indication, wherein kiis between the UE-group power control command of the UE and the PUCCH,which adopts the UE-group power control command to adjust power.

Preferably, the method further includes:

transmitting at least two PUCCHs in one time slot, according to timedivision multiplexing;

wherein the timing between the power control command and the PUCCH,which adopts the power control command to control power, includes:

a timing between the DCI transmitting the TPC and a PUCCH transmission,which adopts the TPC to control power, wherein the TPC comprises a TPCof UE-group common DCI.

Preferably, on the basis of the determined timing, adjustingtransmission power of the corresponding PUCCH according to the powercontrol command, includes:

determining the TPC corresponding to each PUCCH, according to thetiming, wherein the timing is between the DCI transmitting the TPC andthe PUCCH transmission, which adopts the TPC to control power; and,

calculating an accumulated value of a closed-loop power control of eachPUCCH, by using the determined TPC.

Preferably, calculating the accumulated value of the closed-loop powercontrol of each PUCCH includes at least one of:

a first method: calculating the accumulated value g_n(i) of closed-looppower control of each PUCCH respectively, according to

${{g\_ n}(i)} = {{g\left( {i - 1} \right)} + {\underset{m \neq m_{i}}{\sum\limits_{m = 0}^{M - 1}}{\delta_{PUCCH}\left( {i - k_{m}} \right)}}}$

wherein n is number of the PUCCH, and g(i−1) is an accumulated value ofthe closed-loop power control of the last PUCCH within time slot i−1;δ_(PUCCH) is a power adjustment value, which is obtained based on theTPC command; M is the total number of TPC commands pointing to time sloti; m_(i) refers to that, the TPC command of time slot i-m_(i) does notmeet delay processing requirements, and the TPC command of time sloti-m_(i) cannot be applied to calculate g_n (i);

a second method: calculating the accumulated value g(i) of closed-looppower control of at least two PUCCHs, according to

${{g(i)} = {{g\left( {i - 1} \right)} + {\underset{m \neq m_{i}}{\sum\limits_{m = 0}^{M - 1}}{\delta_{PUCCH}\left( {i - k_{m}} \right)}}}};$

wherein δ_(PUCCH) is a power adjustment value, which is obtained basedon the TPC command; M is the total number of TPC commands pointing totime slot i; m_(i) refers to that, the TPC command of time slot i-m_(i)does not meet the delay processing requirements, and the TPC command oftime slot i-m_(i) cannot be applied to calculate g(i).

Preferably, on the basis of the determined timing, adjusting thetransmission power of the corresponding PUCCH, according to the powercontrol command, includes:

for each PUCCH, on the basis of the TPC timing, controlling power of thePUCCH, by using a first TPC command of the corresponding DCI and asecond TPC command of previous DCI, wherein the first TPC command andthe second TPC command are not used for calculating the accumulatedvalue of previous closed-loop power control.

Preferably, when DCI-1 transmitting a TPC command TPC-1 is transmittedin time slot n−k−1, DCI-2 transmitting a TPC command TPC-2 istransmitted in time slot n−k, while PUCCH-1 adopting TPC-1 to controlpower is transmitted in time slot n+p, PUCCH-2 adopting TPC-2 to controlpower is transmitted in time slot n, controlling the power of the PUCCHincludes at least one of:

a first method: calculating the accumulated value of closed-loop powercontrol of PUCCH-2 transmitted in time slot n, by using power adjustmentvalues δ_(PUCCH)(1) and δ_(PUCCH)(2), which are obtained by using TPC-1and TPC-2;

a second method: calculating the accumulated value of closed-loop powercontrol of PUCCH-1 by using TPC-1; and calculating the accumulated valueof closed-loop power control of PUCCH-2 by using TPC-2.

The present disclosure also provides a device for uplink power control,including a timing determining module and a power control module,wherein

the timing determining module is configured to determine a timingbetween a power control command and a PUCCH, which adopts the powercontrol command to control power; and,

the power control module is configured to adjust transmission power ofthe corresponding PUCCH, according to the determined timing and thepower control command.

By adopting the method and device for uplink power control of thepresent disclosure, when determining that a time slot length fortransmitting PUCCH and a time slot length for transmitting power controlcommand are different, a more effective power control method isprovided, such that the power control of PUCCH is more effective. Inaddition, by using the present disclosure, when there is no determinedHARQ timing of PDSCH, the present disclosure provides a method fordetermining a timing between a UE-group power control command and PUCCH,which is transmitted by using the power control command.

An object of the present disclosure is to overcome shortcomings of theprior art and provides a method and a user equipment for transmittinguplink control information (UCI) which have desirable transmissionperformance and efficiency.

In order to achieve the object, the present disclosure provides a methodfor transmitting uplink control information (UCI), which comprises thesteps of:

determining a transmission waveform for a physical uplink shared channel(PUSCH); and

transmitting UCI and data based on the determined transmission waveformfor the PUSCH.

Preferably, the transmission waveform for the PUSCH comprises cyclicprefix-orthogonal frequency division multiplexing (CP-OFDM) or singlecarrier-frequency division multiplexing (SC-FDM).

Preferably, the step of determining the transmission waveform for thePUSCH comprises a step of: determining the transmission waveform for thePUSCH according to a predefined rule or a dynamic indication.

Preferably, the step of determining the transmission waveform for thePUSCH comprises a step of: determining the transmission waveform for thePUSCH to be CP-OFDM if downlink control information (DCI) scheduling thePUSCH supports spatial multiplexing, or determining the transmissionwaveform for the PUSCH according to a dynamic indication if the DCIscheduling the PUSCH does not support spatial multiplexing.

Preferably, the dynamic indication comprises an indication from receivedsystem information, configuration information from a higher-layersignaling or an indication from a received physical layer signaling.

Preferably, the step of transmitting UCI and data based on thedetermined transmission waveform for the PUSCH comprises a step of:

transmitting UCI on a physical uplink control channel (PUCCH) and dataon the PUSCH simultaneously, transmitting UCI and data on each of thePUCCH and the PUSCH simultaneously or transmitting UCI and data only onthe PUSCH if the PUCCH and the PUSCH can be transmitted simultaneously,or transmitting UCI and data only on the PUSCH if the PUCCH and thePUSCH cannot be transmitted simultaneously, in the case that thedetermined transmission waveform for the PUSCH is CP-OFDM; and/or

transmitting UCI on a PUCCH and data on the PUSCH simultaneously,transmitting a hybrid automatic retransmission request-acknowledgement(HARQ-ACK) and/or a scheduling request (SR) in UCI on the PUCCH andtransmitting data and channel state information (CSI) in UCI on thePUSCH simultaneously, transmitting UCI and data only on the PUSCH, ortransmitting UCI and data only on the PUCCH if the PUCCH and the PUSCHcan be transmitted simultaneously, or transmitting UCI and data only onthe PUSCH or transmitting UCI and data only on the PUCCH if the PUCCHand the PUSCH cannot be transmitted simultaneously, in the case that thedetermined transmission waveform for the PUSCH is SC-FDM.

Preferably, the step of transmitting UCI on the PUCCH and data on thePUSCH simultaneously if the PUCCH and the PUSCH can be transmittedsimultaneously in the case that the determined transmission waveform forthe PUSCH is CP-OFDM comprises:

transmitting data on a PUSCH in a subframe and transmitting UCI on oneor more PUCCHs in the subframe if the PUCCH and the PUSCH can betransmitted simultaneously in the case that the determined transmissionwaveform for the PUSCH is CP-OFDM, wherein one or more of HARQ-ACK, CSIand SR in UCI is transmitted on one PUCCH.

Preferably, one or more of HARQ-ACK, CSI and SR in UCI being transmittedon one PUCCH comprises: transmitting information formed by jointly orindividually encoding two or all three of HARQ-ACK, CSI and SR in UCI onone PUCCH.

Preferably, the step of transmitting UCI and data on each of the PUCCHand the PUSCH simultaneously if the PUCCH and the PUSCH can betransmitted simultaneously in the case that the determined transmissionwaveform for the PUSCH is CP-OFDM comprises:

transmitting UCI and data on each of the PUSCH and a PUCCH exclusivelyused by the UE in a subframe if the PUCCH and the PUSCH can betransmitted simultaneously in the case that the determined transmissionwaveform for the PUSCH is CP-OFDM.

In order to achieve above object, the present disclosure furtherprovides a user equipment (UE) for transmitting uplink controlinformation (UCI) which comprises:

a waveform determining module configured to determine a transmissionwaveform for a physical uplink shared channel (PUSCH); and

a data transmitting module configured to transmit UCI and data based onthe determined transmission waveform for the PUSCH.

In order to achieve the object, the present disclosure further providesa method for transmitting uplink control information (UCI). The methodcomprises the steps of:

determining whether a physical uplink control channel (PUCCH) and aphysical uplink shared channel (PUSCH) are included in a frequency bandcapacity; and

transmitting UCI and data according to a result of the step ofdetermining.

Preferably, the step of transmitting UCI and data according to theresult of the step of determining comprises:

transmitting UCI and data on the PUSCH included in the frequency bandcapacity, or transmitting UCI on the PUCCH included in the frequencyband capacity and data on the PUSCH included in the frequency bandcapacity, when it is determined that a PUCCH and a PUSCH are included inthe frequency band capacity; and/or

transmitting UCI and data on the PUSCH included in the frequency bandcapacity, or transmitting UCI on the PUCCH included in the frequencyband capacity without transmitting data, when it is determined that noPUCCH or no PUSCH is included in the frequency band capacity.

Preferably, the step of transmitting UCI and data according to theresult of the step of determining comprises:

transmitting UCI and data on the PUSCH included in the frequency bandcapacity, transmitting UCI on the PUCCH included in the frequency bandcapacity and data on the PUSCH included in the frequency band capacity,or transmitting UCI only on the PUCCH included in the frequency bandcapacity, when it is determined that a PUCCH and a PUSCH are included inthe frequency band capacity;

transmitting UCI on the PUSCH included in the frequency band capacity,and transmitting UCI on the PUCCH included in the frequency bandcapacity without transmitting data when it is determined that no PUCCHor no PUSCH is included in the frequency band capacity; and/or

adding resource for transmitting the PUCCH into the frequency bandcapacity, transmitting UCI on the added resource for transmitting thePUCCH and data on the PUSCH included in the frequency band capacity,when it is determined that a PUSCH is included in frequency bandcapacity and no PUCCH is included therein.

Preferably, when a UE has a plurality of PUCCHs and it is determinedthat some of the plurality of PUCCHs and a PUSCH are included in thefrequency band capacity, the step of transmitting UCI and data accordingto the result of the step of determining comprises a step of:

transmitting UCI required to be transmitted on the plurality of PUCCHson the PUCCHs included in the frequency band capacity;

transmitting UCI corresponding to the PUCCHs included in the frequencyband capacity on these PUCCHs;

transmitting UCI corresponding to the PUCCHs included in the frequencyband capacity on these PUCCHs, and transmitting UCI corresponding to thePUCCH outside the frequency band capacity on the PUSCH included in thefrequency band capacity; or

transmitting UCI required to be transmitted on the plurality of PUCCHson the PUSCH included in the frequency band capacity.

Preferably, following the step of determining whether a PUCCH and aPUSCH are included in the frequency band capacity, the method furthercomprises steps of:

determining a transmission waveform for the PUSCH included in thefrequency band capacity; and

transmitting UCI and data based on the determined transmission waveformfor the PUSCH.

In order to achieve the above object, the present disclosure furtherprovides a user equipment (UE) for transmitting uplink controlinformation (UCI), characterized in that the UE comprises:

a determination module configured to determine whether a physical uplinkcontrol channel (PUCCH) and a physical uplink shared channel (PUSCH) areincluded in a frequency band capacity; and

a transmission module configured to transmit UCI and data according to aresult obtained from the determination module.

As compared to the prior art, the present disclosure has advantageoustechnical effects as follows. The UCI and data to be transmitted on aPUCCH and a PUSCH may be deployed according to the transmission waveformfor the PUSCH, therefore a higher frequency diversity gain may beobtained in the case that there are selectable transmission waveformsfor the PUCCH and the PUSCH. In this way, signal distortion and spectralspread interference due to different peak to average power ratios(PAPRs) of the waveforms may be significantly reduced, and the overalltransmission performance for UCI and system may be dramaticallyimproved.

The objective of the present invention is: overcoming a deficiency of aconventional mechanism, and providing a method and a UE of implementingquick active BWP switching with reduced resource collision and reducedimpact of an adjustment time interval taken by changing the active BWPat a UE on normal UE data reception and transmission.

In order to achieve the above objective, the present invention providesa method of BWP switching, including:

A. receiving DL DCI in time unit n, wherein active BWP indicationinformation in the DCI indicates a switching of an active BWP;

B. determining the active BWP switches in a time unit n+k according tothe received active BWP indication information; and

C. starting to receive a PDCCH and/or a PDSCH on a switched DL activeBWP from the time unit n+k, and/or starting to transmit a PUCCH and/or aPUSCH on a switched UL active BWP from the time unit n+k.

Preferably, for paired spectrum, the receiving DCI in time unit n instep A includes: receiving DL DCI in time unit n, the DL DCI indicates aswitching of a DL active BWP;

the step C includes: starting to receive the PDCCH and/or the PDSCH onthe switched DL active BWP from the time unit n+k.

Preferably, the step B includes: determining the time unit in which theDL active BWP switches according to at least one of:

if the DL DCI schedules a PDSCH, active BWP indication information inthe DL DCI indicates a switching of the DL active BWP, and the PDSCH iswithin the same time unit with the DL DCI, the UE starts to receive thePDSCH on the switched DL active BWP from the time unit, and starts toreceive the PDCCH on the switched DL active BWP from the first DL timeunit subsequent to the time unit in which the PDSCH is received;

if the DL DCI schedules a PDSCH, the active BWP indication informationin the DL DCI indicates a switching of the DL active BWP, and the PDSCHand the DL DCI are in different time units, the UE starts to receive thePDSCH on the switched DL active BWP from the time unit of the PDSCH, andstarts to receive the PDCCH on the switched DL active BWP from the firstDL time unit subsequent to the time unit of the PDSCH;

if the DL DCI schedules a PDSCH, the active BWP indication informationin the DL DCI indicates a switching of the DL active BWP, and the PDSCHand the DL DCI are in different time units, the UE starts to receive thePDSCH on the switched DL active BWP from the time unit of the PDSCH, andstarts to receive the PDCCH on the switched DL active BWP from the timeunit of the PDSCH;

if the DL DCI schedules a PDSCH, the active BWP indication informationin the DL DCI indicates a switching of the DL active BWP, and the PDSCHand the DL DCI are in different time units or in the same time unit, theUE starts to receive the PDSCH on the switched DL active BWP from thek'th time unit subsequent to the time unit of the DL DCI, and starts toreceive the PDCCH on the switched DL active BWP from the time unit ofthe PDSCH; wherein, k is a non-negative integer, is pre-defined in aprotocol or configured by higher layer signaling;

if the DL DCI schedules a PDSCH, the active BWP indication informationin the DL DCI indicates a switching of the DL active BWP, the UEreceives the PDSCH on a current BWP, and starts to receive the PDCCH onthe switched BWP from the k'th time unit subsequent to the time unit ofthe DL DCI; wherein, k is a non-negative integer, is pre-defined in aprotocol or configured by higher layer signaling.

Preferably, when a PDCCH schedules PDSCH transmission in at least twotime units, the PDSCH scheduled by the DL DCI is: the first PDSCH of thePDSCHs scheduled in the at least two time units by the PDCCH.

Preferably, for paired spectrum, receiving DCI in time unit n in step Aincludes: receiving UL DCI in the time unit n, the UL DCI indicates aswitching of an UL active BWP;

the step C includes: starting to transmit a PUSCH and/or a PUCCH on theUL active BWP from a time unit n+k.

Preferably, the step B includes: determining the time unit in which theUL active BWP switches according to:

if the UL DCI schedules a PUSCH and active BWP indication information inthe UL DCI indicates a switching of a UL active BWP, the UE starts totransmit a PUSCH and a PUCCH to a switched UL active BWP from a timeunit where the scheduled PUSCH is transmitted.

Preferably, for unpaired spectrum, receiving DCI in the time unit n instep A includes: receiving DL DCI in the time unit n, the DL DCIindicates a switching of an UL-DL active BWP pair;

the step C includes: starting to receive the PDCCH and/or the PDSCH onthe switched DL active BWP from a time unit n+k1, and starting totransmit the PUCCH and/or the PUSCH to a switched UL active BWP from atime unit n+k2; wherein k1 and k2 are identical to or different fromeach other.

Preferably, the step B includes: determining the time unit in which theDL active BWP switches according to at least one of:

if the DL DCI schedules a PDSCH, the active BWP indication informationin the DL DCI indicates a switching of the UL-DL active BWP pair, andthe PDSCH is within the same time unit with the DL DCI, the UE starts toreceive the PDSCH on a switched DL active BWP from the time unit of theDL DCI, and starts to receive the PDCCH on the switched DL active BWPfrom the first DL time unit subsequent to the time unit in which thePDSCH is received;

if the DL DCI schedules a PDSCH, and the active BWP indicationinformation in the DL DCI indicates a switching of the UL-DL active BWPpair, and the PDSCH and the DL DCI are in different time units, the UEstarts to receive the PDSCH on a switched DL active BWP from the timeunit of the PDSCH, and starts to receive the PDCCH on the switched DLactive BWP from the first DL time unit subsequent to the time unit ofthe PDSCH;

if the DL DCI schedules a PDSCH, the active BWP indication informationin the DL DCI indicates a switching of the UL-DL active BWP pair, andthe PDSCH and the DL DCI are in different time units, the UE starts toreceive the PDSCH on a switched DL active BWP from the time unit of thePDSCH;

if the DL DCI schedules a PDSCH, the active BWP indication informationin the DL DCI indicates a switching of the UL-DL active BWP pair, andthe PDSCH and the DL DCI are in different time units or in the same timeunit, the UE starts to receive the PDCCH on a switched DL active BWPfrom the k'th time unit subsequent to the time unit of the DL DCI, andstarts to receive the PDSCH on the switched DL active BWP from the timeunit of the PDSCH; wherein, k is a non-negative integer, is pre-definedin a protocol or configured by higher layer signaling;

if the DL DCI schedules a PDSCH and the active BWP indicationinformation in the DL DCI indicates a switching of the DL-UL active BWPpair, the UE receives the PDSCH on a current active BWP, and starts toreceive the PDCCH on the switched active BWP from the k'th time unitsubsequent to the time unit of the DL DCI; wherein, k is a non-negativeinteger, is pre-defined in a protocol or configured by higher layersignaling.

Preferably, when k1 equals k2, the step B further includes: starting totransmit, by the UE, a PUCCH and/or a PUSCH on a switched UL active BWPfrom a time unit of the first UL transmission subsequent to the timeunit in which the UE starts to receive the PDCCH or the PDSCH in theswitched DL active BWP; the first UL transmission is PUCCH transmissionor PUSCH transmission.

Preferably, the step B further includes: the k2 of the time unit n+k2 isthe same with a time unit for transmitting HARQ-ACK corresponding to theDL DCI or the same with a time unit for transmitting HARQ-ACKcorresponding to the PDSCH scheduled by the DL DCI; or the k2 ispre-defined in a protocol, or configured by higher layer signaling, orindicated respectively in physical layer signaling; or the value of k2is determined according to a schedule time relation of UL PUSCH.

Preferably, for unpaired spectrum, receiving DCI in the time unit n instep A includes: receiving UL DCI in the time unit n, the UL DCIindicates a switching of a BWP pair including an UL active BWP and a DLactive BWP;

the step C includes: starting to receive the PDCCH and/or the PDSCH on aswitched DL active BWP from a time unit n+k1, and starting to transmitthe PUCCH and/or the PUSCH on a switched UL active BWP from a time unitn+k2; wherein k1 and k2 are identical to or different from each other.

Preferably, when k1 equals k2, the step B includes: if the UL DCIschedules a PUSCH transmitted in time unit m, the value of k1 and k2 ism, or the value of k is pre-defined in a protocol, or configured byhigher layer signaling, or indicated in physical layer signaling.

Preferably, the step B includes: determining the k1 to be a valuepre-defined in a protocol, or configured by higher layer signaling; k2is determined according to: if the UL DCI schedules a PUSCH transmittedin time unit m, the value of k2 is m, or is pre-defined in a protocol,or configured by higher layer signaling, or indicated in physical layersignaling.

Preferably, for unpaired spectrum in time slot aggregation, the timeunit in which the active BWP switches is determined according to atleast one of:

the DL active BWP starts to switch in the first time slot of at leasttwo time slots of a PDSCH scheduled by a time slot aggregated PDCCH;

the DL active BWP starts to switch in the first time slot of at leasttwo time slots using the same pre-coding scheme;

the UL active BWP starts to switch in the first time slot of at leasttwo time slots of a PUSCH scheduled by a time slot aggregated PDCCH;

the UL active BWP starts to switch in the first time slot of at leasttwo time slots using the same pre-coding scheme.

Preferably, the method may also include:

when a first DCI in time unit n indicates an active BWP switches fromBWP-1 to BWP-2 starting from time unit n+L, a PDSCH or a PUSCH isscheduled in time unit n+L, a second DCI in time unit n+k indicates theactive BWP switches from BWP-1 to BWP-3 starting from time unit n+M, anda PDSCH or a PUSCH is scheduled in time unit n+M, k<L, M<L, determiningthe DL active BWP switches from BWP-1 to BWP-3 from time unit n+M, andstarting to receive, by the UE, the PDSCH and/or the PDCCH on BWP-3 fromtime unit n+M, or starting to transmit the PUSCH and/or the PUCCH onBWP-3 from time unit n+M.

The present invention also provides a UE, including:

a receiving module, configured to receive DCI in time unit n, whereinactive BWP indication information in the DCI indicates a switching of anactive BWP;

a determining module, configured to determine the active BWP switches ina time unit n+k according to the received active BWP indicationinformation; and

a receiving module, configured to start to receive a PDCCH and/or aPDSCH on a DL active BWP from the time unit n+k, and/or a transmittingmodule, configured to start to transmit a PUCCH and/or a PUSCH on an ULactive BWP from the time unit n+k.

The present invention also provides a UE, including: a transceiver and aprocessor;

the transceiver is configured to receive DCI in time unit n, whereinactive BWP indication information in the DCI indicates a switching of anactive BWP;

the processor is configured to determine the active BWP switches in atime unit n+k according to the received active BWP indicationinformation;

the transceiver is further configured to start to receive a PDCCH and/ora PDSCH on a DL active BWP from the time unit n+k, and/or start totransmit a PUCCH and/or a PUSCH on an UL active BWP from the time unitn+k.

According to the above technical mechanisms, the present applicationprovides a method and a UE which implement quick active BWP switching byreceiving an indication indicating a switching of an active BWP andswitching the active BWP at a proper time point. Further, the technicalmechanism can reduce resource collisions and reduce the impact of thetime interval for changing the active BWP at a UE on normal datareception and transmission.

The object of the present invention is to solve at least one of theabove technical disadvantages, in particular the problem that it cannotbe applied to the requirements of future 5G radio communication system.

The present invention provides a method for measuring cell, which isapplied to a UE, including the following steps:

measuring a cell to which a UE belongs and neighboring cells in a celllist according to at least one of initial measurement configurationinformation, UE-specific Channel State Information-Reference Signal(CSI-RS) resource(s) and a Synchronize Signal (SS) Block to obtain ameasurement result;

transmitting the measurement result to a base station, so that the basestation determines whether to hand over the cell to which the UEcurrently belongs according to the measurement result.

Preferably, the UE-specific CSI-RS resource(s) includes commonUE-specific CSI-RS resource(s), and the step of measuring the cell towhich the UE belongs and the neighboring cells in the cell listrespectively according to the initial measurement configurationinformation and the UE-specific CSI-RS resource(s) to obtain themeasurement result, including:

measuring the cell to which the UE belongs and the neighboring cells inthe cell list respectively according to the initial measurementconfiguration information and the common UE-specific CSI-RS resource(s)to obtain the measurement result.

Preferably, UE-specific CSI-RS resource(s) includes a specificUE-specific CSI-RS resource(s), and the step of measuring the cell towhich the UE belongs and the neighboring cells in the cell listrespectively according to the initial measurement configurationinformation and the UE-specific CSI-RS resource(s) to obtain themeasurement result, comprising:

measuring the cell to which the UE belongs and the neighboring cells inthe cell list respectively according to the initial measurementconfiguration information and the specific UE-specific CSI-RSresource(s) to obtain the measurement result.

Preferably, the UE-specific CSI-RS resource(s) further includespre-configured UE-specific CSI-RS resource(s), and the step of measuringthe cell to which the UE belongs according to the initial measurementconfiguration information and the UE-specific CSI-RS resource(s) toobtain the measurement result, further including:

measuring the cell to which the UE belongs according to the initialmeasurement configuration information and the pre-configured UE-specificCSI-RS resource(s).

Preferably, the method further includes:

receiving the initial measurement configuration information transmittedby the base station;

performing an initial measurement configuration according to the initialmeasurement configuration information, and returning an initialmeasurement configuration complete message to the base station;

receiving the UE-specific CSI-RS resource(s) transmitted by the basestation.

Preferably, the method further includes:

receiving the initial measurement configuration information andUE-specific CSI-RS resource(s) transmitted by the base station;

performing the initial measurement configuration according to theinitial measurement configuration information, and returning the initialmeasurement configuration complete message to the base station.

Preferably, the configuration way of the common UE-specific CSI-RSresource(s) includes any one of the followings:

the common UE-specific CSI-RS resource(s) is discrete in both thefrequency domain and time domain, and the different time resourcescorrespond to the same frequency resource;

the common UE-specific CSI-RS resource(s) is discrete in both thefrequency domain and time domain, and the different time resourcescorrespond to the different frequency resources;

the common UE-specific CSI-RS resource(s) is discrete in the time domainand is continuous in the frequency domain, and the different timeresources correspond to the same frequency resource;

the common UE-specific CSI-RS resource(s) is discrete in the time domainand is continuous in the frequency domain, and the different timeresources correspond to the different frequency resources;

the common UE-specific CSI-RS resource(s) is continuous in the timedomain and is discrete in the frequency domain, and the different timeresources correspond to the same frequency resource;

the common UE-specific CSI-RS resource(s) is continuous in the timedomain and is discrete in the frequency domain, and the different timeresources correspond to the different frequency resources;

the common UE-specific CSI-RS resource(s) is continuous in both thefrequency domain and time domain, and the different time resourcescorrespond to the same frequency resource;

the common UE-specific CSI-RS resource(s) is continuous in both thefrequency domain and time domain, and the different time resourcescorrespond to the different frequency resources.

Preferably, the UE-specific CSI-RS resource(s) includes pre-configuredUE-specific CSI-RS resource(s), and the step of measuring the cell towhich the UE belongs and the neighboring cells in the cell listrespectively according to the initial measurement configurationinformation and the UE-specific CSI-RS resource(s) to obtain themeasurement result, including:

measuring the cell to which the UE belongs according to the initialmeasurement configuration information and pre-configured UE-specificCSI-RS resource(s) to obtain the measurement result; and

measuring each neighboring cell in the cell list according to theinitial measurement configuration information and the SS Block of eachneighboring cell to obtain the measurement result.

Preferably, the step of measuring the cell to which the UE belongs andthe neighboring cells in the cell list respectively according to theinitial measurement configuration information and the SS Block to obtainthe measurement result, including:

measuring the cell to which the UE belongs according to the initialmeasurement configuration information and the SS Block of the cell towhich the UE belongs to obtain the measurement result;

measuring each neighboring cell in the cell list according to theinitial measurement configuration information and the SS Block of eachneighboring cell to obtain the measurement result.

Preferably, the configuration way of the specific UE-specific CSI-RSresource(s) includes any one of the followings:

the specific UE-specific CSI-RS resource(s) and the common UE-specificCSI-RS resource(s) are discrete in both the time domain and thefrequency domain, and are distinguished by a time division multiplexing(TDM) scheme;

the specific UE-specific CSI-RS resource(s) and the common UE-specificCSI-RS resource(s) are discrete in both the time domain and thefrequency domain, and are distinguished by a frequency divisionmultiplexing (FDM) scheme;

the specific UE-specific CSI-RS resource(s) and the common UE-specificCSI-RS resource(s) are discrete in both time domain and frequencydomain, and are distinguished by the FDM scheme and TDM schemesimultaneously;

the specific UE-specific CSI-RS resource(s) and the common UE-specificCSI-RS resource(s) are discrete in the time domain and are continuous inthe frequency domain, and are distinguished by the TDM schemesimultaneously;

the specific UE-specific CSI-RS resource(s) and the common UE-specificCSI-RS resource(s) are discrete in the time domain and are continuous inthe frequency domain, and are distinguished by the FDM scheme;

the specific UE-specific CSI-RS resource(s) and the common UE-specificCSI-RS resource(s) are discrete in the time domain and are continuous inthe frequency domain, and are distinguished by the FDM scheme and theTDM scheme simultaneously;

the specific UE-specific CSI-RS resource(s) and the common UE-specificCSI-RS resource(s) are continuous in the time domain and are discrete inthe frequency domain, and are distinguished by the TDM schemesimultaneously;

the specific UE-specific CSI-RS resource(s) and the common UE-specificCSI-RS resource(s) are continuous in the time domain and are discrete inthe frequency domain, and are distinguished by the FDM scheme;

the specific UE-specific CSI-RS resource(s) and the common UE-specificCSI-RS resource(s) are continuous in the time domain and are discrete inthe frequency domain, and are distinguished by the FDM scheme and theTDM scheme simultaneously;

the specific UE-specific CSI-RS resource(s) and the common UE-specificCSI-RS resource(s) are continuous both in the time domain and thefrequency domain, and are distinguished by the TDM schemesimultaneously;

the specific UE-specific CSI-RS resource(s) and the common UE-specificCSI-RS resource(s) are continuous both in the time domain and thefrequency domain, and are distinguished by the FDM schemesimultaneously;

the specific UE-specific CSI-RS resource(s) and the common UE-specificCSI-RS resource(s) are continuous both in the time domain and thefrequency domain, and are distinguished by the FDM scheme and TDM schemesimultaneously.

Preferably, the method further includes:

receiving any one of the following information to determine that thenumber of the UE-specific CSI-RS resource(s) is one;

an time-domain index and an frequency-domain index of an specifictime-frequency resource;

the corresponding index of a Physical Resource Block (PRB) or ResourceElement (RE) that is sorted in a time index priority or a frequencyindex priority way;

predefining the timing, and configuring the PRB index or the RE orbitmap information of the frequency resource simultaneously.

Preferably, the method further includes:

receiving any one of the following information to determine that thenumber of the UE-specific CSI-RS resource(s) is at least two;

the number of time-frequency resources in the time-frequency resourcegroup for measurement, and the configuration information of eachtime-frequency resource for measurement;

pre-configured time-domain index and/or frequency-domain index.

The present invention also provides a method for handover, which isapplied to a base station, including the following steps:

transmitting initial measurement configuration information andUE-specific Channel State Information-Reference Signal (CSI-RS)resource(s) to a UE;

receiving a measurement result returned by the UE;

determining whether to hand over a cell to which the UE currentlybelongs according to the measurement result;

transmitting an instruction for handover carries a target neighboringcell, if it is determined to hand over, so that the UE hands over fromthe cell to which the UE belongs to the target neighboring cellaccording to the instruction for handover.

The present invention further provides an apparatus for measuring cell,including:

a processing unit, configured to measure a cell to which the UE belongsand neighboring cells in a cell list according to at least one of theinitial measurement configuration information, UE-specific Channel StateInformation-Reference Signal (CSI-RS) resources(s) and a SynchronizeSignal (SS) Block of the UE state to obtain a measurement result;

a transmitting unit, configured to transmit the measurement result to abase station.

The present invention further provides an apparatus for handover,including:

a transmitting unit, configured to transmit initial measurementconfiguration information and UE-specific Channel StateInformation-Reference Signal (CSI-RS) resource(s) to a UE;

a receiving unit, configured to receive a measurement result returned bythe UE;

a processing unit, configured to determine whether to hand over a cellto which the UE belongs currently according to the measurement result;and when it is determined to hand over, transmit an instruction forhandover carries a target neighboring cell.

By the present invention, the efficiency and performance of themeasurement and handover process for cell are improved.

Additional aspects and advantages of the invention will be set forth inpart in the description which follows, and in part will be obvious fromthe description below, or can be learned by practice of the invention.

The present disclosure provides a method for reporting CSI, therebyensuring a normal transmission of a CSI report in a transmission systemof a NR.

The present disclosure provides a method for reporting Channel StateInformation (CSI), including:

selecting, by a User Equipment (UE), at least one Bandwidth Part (BWP)from a configured BWP;

calculating, by the UE, a CSI report, based on the selected BWP; and,

transmitting, by the UE, the CSI report to a Base Station (BS).

Preferably, the CSI report is an aperiodic CSI report, and the aperiodicCSI report at a time only includes one aperiodic CSI report, which iscalculated based on channels and interference situation of one BWP.

Preferably, selecting by the UE the at least one BWP from the configuredBWP includes:

selecting, by the UE, an active BWP from the configured BWP; wherein theactive BWP is in a time slot, where Downlink Control Information (DCI)transmitting and driving the aperiodic CSI report is located, and theactive BWP is in a serving cell, which requests the aperiodic CSIreport, or,

selecting, by the UE, one BWP with the best Channel Quality Indicator(CQI) from the configured BWP.

Preferably, the CSI report is an aperiodic CSI report, and the aperiodicCSI report at a time includes at least two aperiodic CSI reports, whichare calculated based on channels and interference situations of at leasttwo BWPs.

Preferably, selecting by the UE the at least one BWP from the configuredBWP includes at least one of:

selecting, by the UE, an active BWP from the configured BWP, andselecting at least one BWP with the best CQI from the configured BWP,wherein the active BWP is in a time slot, where DCI transmitting anddriving the aperiodic CSI report is located, and the active BWP is in aserving cell, which requests the aperiodic CSI report;

selecting, by the UE, at least two BWPs from the configured BWP,according to a configuration of high-layer signaling and an indicationof physical-layer signaling; or,

selecting, by the UE, at least two BWPs with the best CQI from theconfigured BWP.

Preferably, the CSI report is a periodic CSI report, one set of periodicCSI reports is configured to be reported, the periodic CSI report at atime includes a periodic CSI report, which is calculated based onchannels and interference situations within an active BWP; and,

wherein selecting by the UE the at least one BWP from the configured BWPincludes: selecting, by the UE, the active BWP from the configured BWP.

Preferably, the CSI report is a periodic CSI report, at least two setsof periodic CSI reports are configured to be reported, one set ofperiodic CSI reports is calculated, based on channels and interferencesituations within an active BWP of the configured BWP, the remainingperiodic CSI reports are calculated, based on channels and interferencesituations within at least one inactive BWP of the configured BWP, orbased on channels and interference situations within all the BWPs.

Preferably, the method further includes:

determining, by the UE, a Channel State Information-Reference Signal(CSI-RS) resource, on which the aperiodic CSI report is based, andreceiving a corresponding CSI-RS.

Preferably, receiving by the UE the corresponding CSI-RS includes atleast one of:

when receiving an aperiodic CSI-RS drive, in a different downlink timeslot, respectively receiving, by the UE, CSI-RS within all the BWPsconfigured by the UE, or, respectively receiving CSI-RS within somedesignated BWPs among all the BWPs configured by the UE;

receiving, by the UE, the CSI-RS resource of the periodic CSI report;or,

firstly receiving, by the UE, a CSI-RS within a BWP, which is mostadjacent to the aperiodic CSI report, according to a set sequence of BWPnumber.

Preferably, the method further includes:

determining, by the UE, the CSI-RS resource, on which one set ofperiodic CSI reports is based, and receiving the corresponding CSI-RS.

Preferably, receiving by the UE the corresponding CSI-RS includes:

on the basis of a configuration about one set of periodic CSI reports,receiving the CSI-RS in a time slot corresponding to the active BWP ofthe configured BWP.

Preferably, the method further includes:

determining, by the UE, the CSI-RS resource, on which at least two setsof periodic CSI reports are based, and receiving the correspondingCSI-RS.

Preferably, receiving by the UE the corresponding CSI-RS includes:

on the basis of configurations about the two sets of periodic CSIreports, receiving one set of CSI-RS in a time slot corresponding to theactive BWP of the configured BWP, and receiving the remaining CSI-RS ina time slot corresponding to the active BWP, or the inactive BWP of theconfigured BWP.

The present disclosure also provides a device for reporting CSI,including a BWP selecting module, a CSI calculating module and a CSIreporting module, wherein

the BWP selecting module is configured to select at least one BWP fromat least one BWP configured by the device;

the CSI calculating module is configured to calculate a CSI report,based on the selected BWP; and,

the CSI reporting module is configured to transmit the CSI report to aBase Station (BS).

On the basis of foregoing technical solutions, it can be seen that, inthe present disclosure, the UE selects at least one BWP from at leastone configured BWP, so as to calculate CSI. And, the UE determines amethod for calculating the CSI, based on a type of the selected BWP,calculates the CSI, and transmits the CSI report to the BS, therebyensuring a normal transmission of the CSI report in the transmissionsystem of the NR.

Advantageous Effects of Invention

The present disclosure provides a method and a device for uplink powercontrol, such that power control of PUCCH is more effective. By adoptingthe method and device for uplink power control of the presentdisclosure, when determining that a time slot length for transmittingPUCCH and a time slot length for transmitting power control command aredifferent, a more effective power control method is provided, such thatthe power control of PUCCH is more effective. In addition, by using thepresent disclosure, when there is no determined HARQ timing of PDSCH,the present disclosure provides a method for determining a timingbetween a UE-group power control command and PUCCH, which is transmittedby using the power control command.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a schematic diagram illustrating a frame structure of a TDDsystem in the LTE.

FIG. 2 is a schematic diagram illustrating an example of a HARQ-ACKtiming of the LTE.

FIG. 3 is a schematic diagram illustrating a basic flow to determine apower-control timing, in accordance with an embodiment of the presentdisclosure.

FIG. 4 is a schematic diagram illustrating a timing between a powercontrol command and power, which is adjusted by using the power controlcommand, when value k of a different UE in the same group is the same,in accordance with a first embodiment of the present disclosure.

FIG. 5 is a schematic diagram illustrating a timing between a powercontrol command and power, which is adjusted by using the power controlcommand, when value k of a different UE in the same group is different,in accordance with the first embodiment of the present disclosure.

FIG. 6 is a schematic diagram illustrating a timing between a powercontrol command and power, which is adjusted by using the power controlcommand, when value k of a different UE in the same group is differentin the case of FDD, in accordance with the first embodiment of thepresent disclosure.

FIG. 7 is a schematic diagram illustrating a first mode, where a timingset is determined and a specific time interval value in the timing setis indicated by physical layer signaling, in accordance with the firstembodiment of the present disclosure.

FIG. 8 is a schematic diagram illustrating a second mode, where a timingset is determined and a specific time interval value of the timing setis indicated by physical layer signaling, in accordance with the firstembodiment of the present disclosure.

FIG. 9 is a schematic diagram illustrating a third mode, where a timingset is determined and a specific time interval value of the timing setis indicated by physical layer signaling, in accordance with the firstembodiment of the present disclosure.

FIG. 10 is a schematic diagram illustrating a method for transmitting atleast two PUCCHs in one time slot, according to time division duplexing,in accordance with a second embodiment of the present disclosure.

FIG. 11 is a schematic diagram illustrating a method for calculating anaccumulated value of closed-loop power control of two PUCCHs within thesame time slot, in accordance with the second embodiment of the presentdisclosure.

FIG. 12 is a schematic diagram illustrating an application scene, inaccordance with a third embodiment of the present disclosure.

FIG. 13 is a schematic diagram illustrating a structure of a device foruplink power control, in accordance with a preferred embodiment of thepresent disclosure.

FIG. 14 schematically illustrates frequency hopping of a PUCCH of LTEwithin a subframe.

FIG. 15 is a flowchart illustrating a method for transmitting UCIaccording to the present disclosure.

FIG. 16 schematically illustrates how UE transmits UCI according to awaveform of a PUSCH according to the present disclosure.

FIG. 17 schematically illustrates how UE transmits UCI according to abandwidth capacity according to a first example of the presentdisclosure.

FIG. 18 schematically illustrates how UE transmits UCI according to abandwidth capacity according to a second example of the presentdisclosure.

FIG. 19 schematically illustrates how UE transmits UCI according to abandwidth capacity according to a third example of the presentdisclosure.

FIG. 20 schematically illustrates how UE transmits UCI according to abandwidth capacity according to a fourth example of the presentdisclosure.

FIG. 21 schematically illustrates how UE transmits UCI according to abandwidth capacity according to a fifth example of the presentdisclosure.

FIG. 22 schematically illustrates how UE transmits UCI according to aslot length according to a first example of the present disclosure.

FIG. 23 schematically illustrates how UE transmits UCI according to aslot length according to a second example of the present disclosure.

FIG. 24 schematically illustrates how UE transmits UCI according to aslot length according to a third example of the present disclosure.

FIG. 25 schematically illustrates how UE transmits UCI according to aslot length according to a fourth example of the present disclosure.

FIG. 26 schematically illustrates how UE transmits UCI according to aslot length according to a fifth example of the present disclosure.

FIG. 27 schematically illustrates how UE transmits UCI according to aslot length according to a sixth example of the present disclosure.

FIG. 28 schematically illustrates how UE transmits UCI according to aslot length according to a seventh example of the present disclosure.

FIG. 29 is a block diagram illustrating a UE for transmitting UCIaccording to the present disclosure.

FIG. 30 is a schematic diagram illustrating a limited frequency band onwhich a UE operates according to the background of the presentinvention.

FIG. 31 is a flowchart illustrating a method of BWP switching accordingto the present invention.

FIG. 32 is a schematic diagram illustrating BWPs on which a UE receivesa PDCCH according to method one of embodiment one of the presentinvention.

FIG. 33 is a schematic diagram illustrating BWPs on which a UE receivesa PDCCH according to method two of embodiment one of the presentinvention.

FIG. 34 is a schematic diagram illustrating BWPs on which a UE receivesa PDCCH according to method three of embodiment one of the presentinvention.

FIG. 35 is a schematic diagram illustrating BWPs on which a UE receivesa PDCCH in an example according to method four of embodiment one of thepresent invention.

FIG. 36 is a schematic diagram illustrating BWPs on which a UE receivesa PDCCH in another example according to method four of embodiment one ofthe present invention.

FIG. 37 is a schematic diagram illustrating BWPs on which a UE receivesa PDCCH according to method five of embodiment one of the presentinvention.

FIG. 38 is a schematic diagram illustrating BWPs on which a UE receivesa PDCCH when the PDCCH schedules a PDSCH transmitted in at least twotime slots according to embodiment one of the present invention.

FIG. 39 is a schematic diagram illustrating BWPs on which a UE transmitsa PUSCH and a PUCCH according to embodiment two of the presentinvention.

FIG. 40 is a schematic diagram illustrating BWPs on which a UE transmitsa PUSCH and a PUCCH according to method one of embodiment three of thepresent invention.

FIG. 41 is a schematic diagram illustrating BWPs on which a UE transmitsa PUSCH and a PUCCH according to method two of embodiment three of thepresent invention.

FIG. 42 is a schematic diagram illustrating avoiding collision betweenresources of a PUSCH and resources of a PUCCH according to method two ofembodiment three of the present invention.

FIG. 43 is a schematic diagram illustrating BWPs on which a UE receivesa PDCCH and a PDSCH and transmits a PUSCH and a PUCCH according tomethod one of embodiment four of the present invention.

FIG. 44 is a schematic diagram illustrating BWPs on which a UE receivesa PDCCH and a PDSCH and transmits a PUSCH and a PUCCH according tomethod two of embodiment four of the present invention.

FIG. 45 is a schematic diagram illustrating BWPs on which a UE receivesa PDCCH and a PDSCH and transmits a PUSCH and a PUCCH according toembodiment six of the present invention.

FIG. 46 is a schematic diagram illustrating a preferred structure of aUE in accordance of the present invention.

FIG. 47 is a schematic diagram illustrating a preferred structure of aUE in accordance with the present invention.

FIG. 48 is a flowchart of a method for measuring and handover cell inthe prior art;

FIG. 49 is a flowchart of a method for measuring cell provided by thepresent invention;

FIG. 50 is a flowchart of a method for handover provided by the presentinvention;

FIG. 51 is a flowchart of a method for measuring and handover cellprovided by the present invention;

FIG. 52 is a schematic diagram 1 a of a configuration of specificUE-specific CSI-RS resources provided by the present invention;

FIG. 53 is a schematic diagram 2 a of a configuration of specificUE-specific CSI-RS resources provided by the present invention;

FIG. 54 is a schematic diagram 3 a of a configuration of specificUE-specific CSI-RS resources provided by the present invention;

FIG. 55 is a schematic diagram 4 a of a configuration of specificUE-specific CSI-RS resources provided by the present invention;

FIG. 56 is a schematic diagram 5 a of a configuration of specificUE-specific CSI-RS resources provided by the present invention;

FIG. 57 is a schematic diagram 6 a of a configuration of specificUE-specific CSI-RS resources provided by the present invention;

FIG. 58 is a schematic diagram 7 a of a configuration of specificUE-specific CSI-RS resources provided by the present invention;

FIG. 59 is a schematic diagram 8 a of a configuration of specificUE-specific CSI-RS resources provided by the present invention;

FIG. 60 is a schematic diagram 9 a of a configuration of specificUE-specific CSI-RS resources provided by the present invention;

FIG. 61 is a schematic diagram 10 a of a configuration of specificUE-specific CSI-RS resources provided by the present invention;

FIG. 62 is a schematic diagram 11 a of a configuration of specificUE-specific CSI-RS resources provided by the present invention;

FIG. 63 is a schematic diagram 12 a of a configuration of specificUE-specific CSI-RS resources provided by the present invention;

FIG. 64 is a schematic diagram 1 b of a configuration of commonUE-specific CSI-RS resource provided by the present invention;

FIG. 65 a schematic diagram 2 b of a configuration of common UE-specificCSI-RS resource provided by the present invention;

FIG. 66 is a schematic diagram 3 b of a configuration of commonUE-specific CSI-RS resource provided by the present invention;

FIG. 67 is a schematic diagram 4 b of a configuration of commonUE-specific CSI-RS resource provided by the present invention;

FIG. 68 is a schematic diagram 5 b of a configuration of commonUE-specific CSI-RS resource provided by the present invention;

FIG. 69 is a schematic diagram 6 b of a configuration of commonUE-specific CSI-RS resource provided by the present invention;

FIG. 70 is a schematic diagram 7 b of a configuration of commonUE-specific CSI-RS resource provided by the present invention;

FIG. 71 is a schematic diagram 8 b of a configuration of commonUE-specific CSI-RS resource provided by the present invention;

FIG. 72 is a schematic diagram of a configuration way of configuringUE-specific CSI-RS resources for measurement evenly spaced in afrequency domain according to an embodiment of the present invention;

FIG. 73 is a schematic diagram of a configuration way of configuringUE-specific CSI-RS resources for measurement evenly spaced in afrequency domain according to an embodiment of the present invention;

FIG. 74 is a schematic diagram of a configuration way of configuringUE-specific CSI-RS resources for measurement evenly spaced in afrequency domain and a time domain according to an embodiment of thepresent invention;

FIG. 75 is a structural diagram of an apparatus for measuring cellaccording to the present invention;

FIG. 76 is a structural diagram of an apparatus for handover accordingto the present invention;

FIG. 77 is a schematic diagram of an example of a mobile communicationnetwork according to an embodiment of the present invention.

Explanation of the drawings: the meanings of the diagrams in FIGS. 52-68are the same as those shown on the right of FIG. 52 .

FIG. 78 is a schematic diagram illustrating a structure of a BWP of anexisting serving cell.

FIG. 79 is a basic flow chart illustrating a method for reporting CSI,in accordance with an embodiment of the present disclosure.

FIG. 80 is a schematic diagram illustrating how to calculate anaperiodic CSI report, based on an active BWP, in accordance with a firstembodiment of the present disclosure.

FIG. 81 is a schematic diagram illustrating a different active BWP at adifferent time moment, in accordance with an embodiment of the presentdisclosure.

FIG. 82 is a schematic diagram illustrating how to calculate a periodicCSI report, based on an active BWP, in accordance with a secondembodiment of the present disclosure.

FIG. 83 is a schematic diagram illustrating BWPs, on which two periodicCSI reports are respectively based, in accordance with the secondembodiment of the present disclosure.

FIG. 84 is a schematic diagram illustrating time moments for reporting aself-contained CSI report and a non-self-contained CSI report, inaccordance with the second embodiment of the present disclosure.

FIG. 85 is a schematic diagram illustrating how to receive CSI-RS by aUE on all the BWPs at different time moments, in accordance with a thirdembodiment of the present disclosure.

FIG. 86 is a schematic diagram illustrating how to receive CSI-RS by aUE on some BWPs at different time moments, in accordance with the thirdembodiment of the present disclosure.

FIG. 87 is a schematic diagram illustrating a time slot, where CSI-RSresource of each BWP is located, in accordance with the third embodimentof the present disclosure.

FIG. 88 is a schematic diagram illustrating how to firstly receiveCSI-RS within a BWP by a UE, based on a descending order of BWP number,where the BWP is closest to an interval of an aperiodic CSI report, inaccordance with the third embodiment of the present disclosure.

FIG. 89 is a schematic diagram illustrating how to transmit CSI-RS onone BWP at the same time moment, in accordance with a fourth embodimentof the present disclosure.

FIG. 90 is a schematic diagram illustrating how to transmit CSI-RS onmultiple BWPs within one time window, based on time-divisionmultiplexing, in accordance with the fourth embodiment of the presentdisclosure.

FIG. 91 is a schematic diagram illustrating a configured periodic gap,in accordance with a fifth embodiment of the present disclosure.

FIG. 92 is a schematic diagram illustrating a time slot for a UE todetect CORESET and receive PDSCH, in accordance with a first method ofthe fifth embodiment of the present disclosure.

FIG. 93 is a schematic diagram illustrating that a UE does not detectCORESET at a CORESET, when the CORESET of time slot n and gap areoverlapped, in accordance with a second method of the fifth embodimentof the present disclosure.

FIG. 94 is a schematic diagram illustrating how to detect CORESET by aUE at a CORESET, when the CORESET of time slot n and gap are notoverlapped, in accordance with the second method of the fifth embodimentof the present disclosure.

FIG. 95 is a schematic diagram illustrating a basic structure of adevice for reporting CSI, in accordance with a preferred embodiment ofthe present disclosure.

MODE FOR THE INVENTION

To make objectives, technical solutions and advantages of the presentdisclosure more clear, detailed descriptions about the presentdisclosure are further provided in the following, accompanying withattached figures and embodiments.

To implement the objectives of the present disclosure, the presentdisclosure provides a method for uplink power control, as shown in FIG.2 , the method includes the following blocks.

In block 301, a timing between a power control command and a PUCCH isdetermined, in which the PUCCH adopts the power control command.

In block 302, on the basis of the determined timing between the powercontrol command and the PUCCH, transmission power of the PUCCH isadjusted, according to the power control command.

At this time, a timing between a PDSCH scheduled by DCI and a PUCCH isdynamically indicated by information in the DCI, in which HARQ-ACKgenerated by transmitting the PDSCH belongs to the PUCCH.

Detailed descriptions of the technical solutions in the presentdisclosure are further provided in the following, accompanying withseveral preferred embodiments.

A First Embodiment

The embodiment describes a timing between a UE-group power controlcommand and an uplink PUCCH transmission, which adopts the UE-grouppower control command to control power. The power control command hererefers to a public power control command (e.g., a power control commandof DCI format 3/3A transmission in the LTE) of a UE-group. One DCI mayprovide power control command for PUCCH of multiple UEs. Here, the PUCCHmay be used for transmitting HARQ-ACK, CSI and UCI of SR.

At this time, a timing between the PDSCH and HARQ-ACK generated by thePDSCH is jointly determined by high-layer signaling configuration, andDCI indication of PDCCH scheduling the PDSCH. For example, a BSconfigures 4 values for a UE through high-layer signaling, which arerespectively {k0, k1, k2, k3}. There are 2 bits in the DCI, which areused for indicating that the timing between PDSCH and HARQ-ACK generatedby the PDSCH is an index of an element of the set {k0, k1, k2, k3}. ThePDSCH is transmitted in time slot n−ki. The HARQ-ACK is transmitted intime slot n, as shown in Table 5. For a different UE, an independenttiming set is respectively configured by independent high-layersignaling. At this time, a TPC command included by DCI of PDCCHscheduling PDSCH is also determined, according to the timing. Forexample, the PDSCH is transmitted in time slot n−ki. The HARQ-ACKgenerated by PDSCH is transmitted in time slot n, and then, the TPCcommand of PDCCH scheduling PDSCH transmitted in time slot n−ki isapplied to power control of PUCCH, which transmits HARQ-ACK in time slotn. This is a power control method, which is implemented according to TPCof DCI in the PDCCH scheduling PDSCH. The power control command is forone UE.

TABLE 5 Indication value of a time interval ki between PDSCHtransmission HARQ-ACK timing and HARQ-ACK transmission 00 k0 configuredby high-layer signaling 01 k1 configured by high-layer signaling 10 k2configured by high-layer signaling 11 k3 configured by high-layersignaling

There is another method for transmitting the power control command. OneDCI transmits at least one power control command. Each power controlcommand is for one UE, which is referred to as a UE-group power controlcommand. The DCI is for at least one UE. At this time, since the timingbetween PDSCH and HARQ-ACK generated by PDSCH is dynamically indicatedby DCI of PDCCH scheduling PDSCH, it is not the determined timing anymore. At this time, the timing between DCI transmitting UE-group powercontrol command the PUCCH does not exist, in which the PUCCH adopts theUE-group power control command to adjust power. Thus, it is necessary todetermine a timing, so as to adopt the UE-group power control command toadjust the PUCCH power according to the timing.

In such a case, how a UE determines a timing between a UE-group powercontrol command and a PUCCH, which adopts the UE-group power controlcommand to adjust power, is described in the following. A UE maydetermine the timing between a UE-group public power control command anda PUCCH transmission, which adopts these power control commands, throughexplicit signaling (explicit signaling includes system information,high-layer signaling, media access layer signaling, or physical layersignaling, and so on), implicit signaling and a protocol preset method.That is, the UE-group public power control command is transmitted intime slot n−k. The PUCCH applying the power control command istransmitted in time slot n. Determine the timing is equivalent todetermine value k. Several methods for determining the timing betweenthe UE-group public power control command and the PUCCH, which adoptsthese power control commands to adjust power, are described in detail asfollows.

A First Method:

A UE obtains a timing between a UE-group power control command and aPUCCH transmission, which adopts these power control commands, byreceiving explicit signaling (e.g., system information, high-layersignaling) from a BS. That is, the UE-group power control command istransmitted in time slot n−k. The PUCCH is transmitted in time slot n,in which the PUCCH adopts these power control commands to adjust power.The UE obtains value k, by receiving the explicit signaling (e.g.,system information, high-layer signaling) from the BS, and k is aninteger greater than or equal to 0. When value k is configured byhigh-layer signaling, value k may be configured by public high-layersignaling, or UE-specific high-layer signaling. For a different UE in agroup, value k may be the same, which leads to a convenient transmissionin TDD, as shown in FIG. 4 ; otherwise, when value k is different for adifferent UE, it is inconvenient. For example, assume that the UE-groupDCI including power control command is transmitted in time slot n, valuek of UE1 is k1, time slot n+k1 of UE1 is an uplink time slot, which maytransmit PUCCH. Value k of UE2 is k2, while time slot n+k2 of UE2 is adownlink time slot, which cannot transmit PUCCH. As shown in FIG. 5 , insuch a case, it is inconvenient. For a different UE in the same group,value k may also be different, such that power may be adjusted flexiblyfor different requirements of various UEs in the FDD, e.g., the UE-groupDCI including power control command is transmitted in time slot n. Valuek of UE1 is k1. The power control command of UE1 may be applied to poweradjustment of PUCCH, which is transmitted in time slot n+k1. Value k ofUE2 is k2, while the power control command of UE2 may be applied topower adjustment of PUCCH, which is transmitted in time slot n+k2, asshown in FIG. 6 .

Alternatively, value k is determined by protocol preset. And value k ofa different UE is the same.

The method is easy to be implemented, and needed signaling overhead issmaller. However, the method cannot flexibly adjust the timing.

A Second Method:

There is a timing between a transmission of a UE-group power controlcommand and a PUCCH transmission, which adopts these power controlcommands to adjust power. That is, the UE-group power control command istransmitted in time slot n−k. The PUCCH is transmitted in time slot n,in which the PUCCH adopts these power control commands to adjust power.A UE obtains value k, through a combination of explicit signaling andphysical layer signaling, or through the physical layer signaling, and kis an integer greater than or equal to 0. The timing is referred to as aTPC timing. For example, a UE obtains a timing set through explicitsignaling (e.g., system information, high-layer signaling). For example,the timing set is {k0, k1, k2, k3}, which is referred to as a TPC timingset. And then, a specific time interval value in the set is indicated byphysical layer signaling. A corresponding between an indication value ofa UE-group TPC timing and a time interval ki is shown in Table 6, and kirefers to a time interval between the UE-group power control command anda PUCCH, which adopts the UE-group power control command to adjustpower. This method may dynamically adjust the timing between theUE-group power control command and PUCCH transmission, which adoptsthese power control commands to adjust power, thereby adjusting powermore timely.

TABLE 6 Indication value time interval ki between UE-group power controlcommand and PUCCH adopting the of UE-group TPC timing UE-group powercontrol command to adjust power 00 k0 01 k1 10 k2 11 k3

Several methods for determining the timing set, and indicating aspecific time interval in the timing set through physical layersignaling are described in the following.

A First Mode:

A timing set of a UE transmitting power control command within the sameUE-group DCI is the same. A UE obtains a timing set through explicitsignaling (e.g., system information, high-layer signaling), e.g., thetiming set is {k0, k1, k2, k3}. Within the DCI transmitting the UE-grouppower control command, in addition to transmitting the power controlcommand of each UE, the DCI also transmits TPC timing indication of aspecific UE-group, which is used for taking a value of the timing set asa time interval ki. The time interval ki is between the UE-group powercontrol command of the UE and a PUCCH, which adopts the UE-group powercontrol command to adjust power. The time interval value indicated bythe timing indication is applied to all the UEs of the UE-group, thatis, it indicates the time interval ki between the UE-group power controlcommand of all the UEs in the group and the PUCCH, which adopts theUE-group power control command to adjust power, as shown in FIG. 7 . Forexample, information of the transmitted DCI of the UE-group is {TPC1,TPC2, . . . , TPCn, . . . , TPCN, TPC timing indication of UE-group}. Nrepresents N power control commands, which are included by the DCI ofthe UE-group power control command. An indication field of UE-group TPCtiming includes L bits (e.g., L is 2). A corresponding between anindication value of a UE-group TPC timing and a time interval ki isshown in Table 6, and ki refers to a time interval between the UE-grouppower control command and a PUCCH, which adopts the UE-group powercontrol command to adjust power.

A Second Mode:

Within the same UE-group DCI, a TPC timing set of a different UEtransmitting a power control command is different. For example, a UEobtains a TPC timing set of the UE through explicit signaling (e.g.,high-layer signaling). Alternatively, within the UE-group DCI, a TPCtiming set of a UE transmitting a power control command is the same as aHARQ timing set of the UE. For example, a TPC timing set of UE1 is {k0_,k1_1, k21, k3_1}. A TPC timing set of UE2 is {k0_2, k1_2, k2_2, k3_3}.In the DCI transmitting the UE-group power control command, in additionto transmitting the power control command of each UE, TPC timingindication of a specific UE-group is also transmitted. For all the UEsin the UE-group, an indication value of TPC timing of a UE-group is thesame. However, since timing set of a different UE is different, a timeinterval ki between the UE-group power control command of each UE andPUCCH may also be different, in which the PUCCH adopts the UE-grouppower control command to adjust power. A time interval value of adifferent UE is applied to a different UE. That is, a time interval kiis indicated, in which ki is between the UE-group power control commandof each UE within a group and a PUCCH, which adopts the UE-group powercontrol command to adjust power. As shown in FIG. 8 , for example,information of the transmitted DCI is {TPC1, TPC2, . . . , TPCn, . . . ,TPCN, TPC timing indication of UE-group}. N denotes that the DCI of theUE-group power control command includes N power control commands. Anindication field of UE-group TPC timing includes 2 bits. A correspondingbetween an indication value of UE-group TPC timing and a time intervalki is shown in Table 7. The time interval ki is between a UE-group powercontrol command and a PUCCH, which adopts the UE-group power controlcommand to adjust power. For example, an indication value of UE-groupTPC timing is 01. For UE1, a time interval between a UE-group powercontrol command and a PUCCH is k1_1, in which the PUCCH adopts theUE-group power control command to adjust power. For UE2, a time intervalbetween a UE-group power control command and a PUCCH is k1_2, in whichthe PUCCH adopts the UE-group power control command to adjust power.

TABLE 7 an indication value of UE-group TPC time interval ki of timeinterval ki of time interval ki of timing UE1 UE2 . . . UEN 00 k0_1 k0_2k0_N 01 k1_1 k1_2 k1_N 10 k2_1 k2_2 k2_N 11 k3_1 k3_2 k3_N

By adopting the method, a time interval between a UE-group power controlcommand and applying the UE-group power control command may bedynamically adjusted. The method is easy to implement, and neededsignaling overheads are smaller.

A Third Mode:

A TPC timing set of a UE transmitting a power control command within thesame UE-group DCI is different, or the same. For example, a UE obtains aTPC timing set of the UE through explicit signaling (e.g., systeminformation, or high-layer signaling). Alternatively, a TPC timing setof a UE transmitting a power control command within UE-group DCI is thesame as a HARQ timing set of the UE. For example, a TPC timing set ofUE1 is {k0_1, k1_1, k21, k3_1}. A TPC timing set of UE2 is {k0_2, k1_2,k2_2, k3_3}. In the DCI transmitting the UE-group power control command,in addition to transmitting the power control command of each UE, TPCtiming indication of a specific UE-group is respectively transmittedcorresponding to each UE. The TPC timing indication of a different UE isapplied to a different UE. That is, a time interval ki is indicated, andki is between a UE-group power control command of the UE and a PUCCH,which adopts the UE-group power control command to adjust power. Asshown in FIG. 9 , for example, information of the transmitted DCI is{TPC1, TPC timing indication 1 of UE-group, TPC2, TPC timing indication2 of UE-group, . . . , TPCN, TPC timing indication N of UE-group}. Ndenotes that the DCI of the UE-group power control command includes Npower control commands. An indication field of TPC timing of eachUE-group includes 2 bits. A corresponding between an indication value ofUE-group TPC timing and a time interval ki is shown in Table 8. The timeinterval ki is between a UE-group power control command and a PUCCH,which adopts the UE-group power control command to adjust power.

TABLE 8 an indication value of UE-group TPC timing of UE1 time intervalki of UE1 00 k0_1 01 k1_1 10 k2_1 11 k3_1

By adopting the method, a time interval between a UE-group power controlcommand and a PUCCH, which adopts the UE-group power control command toadjust power, may be dynamically adjusted. Besides, for a different UE,a TPC timing is respectively determined, and the needed signalingoverheads are greater.

A Third Method:

A UE obtains a timing between a UE-group power control command and aPUCCH, which adopts these power control commands to adjust power, byreceiving implicit signaling from a BS. That is, the UE-group powercontrol command is transmitted in time slot n−k. The PUCCH, which adoptsthese power control commands to adjust power, is transmitted in timeslot n. The UE obtains value k from the implicit signaling, which isreceived from the BS, and k is an integer greater than or equal to 0.

For example, assume that a UE has already configured a HARQ timing set,and then, each UE selects a determined element from the HARQ timing setof the UE, and takes the determined element as a time interval value kbetween the UE-group power control command of the UE and a PUCCHtransmission, which adopts these power control commands to adjust power.For example, the time interval value k between the UE-group powercontrol command of the UE and the PUCCH transmission, which adopts thesepower control commands to adjust power, is the minimum value (or, themaximum value; or, the minimum value, and time slot n is an uplink timeslot; or the maximum value, and time slot n is an uplink time slot) ofthe HARQ timing set. For example, the HARQ timing set of the UE is{1,2,3,4}. The minimum value of the HARQ timing set is 1. And then, thetime interval between the UE-group power control command of the UE andthe PUCCH transmission is 1, in which the PUCCH transmission adoptsthese power control commands to adjust power. Alternatively, forexample, the time interval k is the first value in the HARQ timing set,and k is between the UE-group power control command of the UE and thePUCCH transmission, which adopts these power control commands to adjustpower. For example, the HARQ timing set of the UE is {1,2,3,4}, and thefirst value of the HARQ timing relationship is 1. Subsequently, the timeinterval between the UE-group power control command of the UE and thePUCCH transmission is 1, in which the PUCCH transmission adopts thesepower control commands to adjust power.

Additional physical-layer signaling overheads are not needed by themethod. However, the timing cannot be adjusted flexibly.

The method for determining the time interval between the UE-group powercontrol command and the PUCCH transmission, which adopts these powercontrol commands to adjust power, may be applied to determine a timeinterval, which is between a UE-group power control command and a PUSCHtransmission. The PUSCH transmission adopts these power control commandsto adjust power. The differences are as follows. The UE-group powercontrol command for PUCCH is replaced with the UE-group power controlcommand for PUSCH. And, the PUCCH is replaced with PUSCH. Besides, theHARQ timing set configured by the UE is replaced with a time intervalset, in which the time interval is between UL DCI configured by the UEand PUSCH scheduled by the DCI.

A Fourth Method:

A UE obtains a timing by using a default HARQ timing. The timing isbetween a UE-group power control command and a PUCCH transmission, whichadopts these power control commands to adjust power. Here, the defaultHARQ timing refers to a timing, which is between a PDSCH scheduled by aPDCCH of public search space and a HARQ transmission of the PDSCH. Thedefault HARQ timing may be preset by protocol, or indicated by systeminformation. That is, the PDSCH scheduled by PDCCH of public searchspace is transmitted in time slot n−k. HARQ transmission of the PDSCH isin time slot n. Subsequently, the UE receives the UE-group power controlcommand in time slot n−k. The UE applies the UE-group power controlcommand to time slot n.

A Second Embodiment

In a New Radio (NR) communication system, multiple PUCCH transmissionsof one time slot are introduced. For example, there are two PUCCHtransmissions in time slot n, according to time division multiplexing.The first PUCCH is denoted as PUCCH-1, and the second PUCCH is denotedas PUCCH-2, as shown in FIG. 10 . At this time, in a timing between DCItransmitting TPC and an uplink UCI transmission, a time slot is taken asa unit, in which the uplink UCI transmission adopts the TPC to controlpower. For example, the DCI including TPC is transmitted in time slot n.The uplink UCI is transmitted in time slot n+k, in which the uplink UCIadopts the TPC to control power. The TPC here includes TPC of DCIscheduling PDSCH, and TPC in common DCI of UE-group. At this time, thereare the following methods to control power of multiple PUCCHs in onetime slot.

A First Method:

When there are at least two PUCCHs transmitted within one time slotaccording to time division multiplexing, an accumulated value g(i) ofclosed-loop power control is respectively calculated for each PUCCH. Forexample, there are two PUCCHs transmitted within time slot i, accordingto time division multiplexing. The first PUCCH is denoted as PUCCH-1.The second PUCCH is denoted as PUCCH-2. For PUCCH-1, an accumulatedvalue of closed-loop power control is denoted as g_1(i). For PUCCH-2, anaccumulated value of closed-loop power control is denoted as g_2(i).δ_(PUCCH) is a power adjustment value, which is obtained based on a TPCcommand. g_1(i) and g_2(i) may be respectively calculated, based onformulas

${{g\_}1(i)} = {{g\left( {i - 1} \right)} + {\underset{m \neq m_{i}}{\sum\limits_{m = 0}^{M - 1}}{\delta_{PUCCH}\left( {i - k_{m}} \right)}}}$and${{g\_}2(i)} = {{g\left( {i - 1} \right)} + {\underset{m \neq m_{i}}{\sum\limits_{m = 0}^{M - 1}}{{\delta_{PUCCH}\left( {i - k_{m}} \right)}.}}}$

And, m_(i) refers to that, the TPC command of time slot i-m_(i) does notmeet the delay processing requirements.

Specifically, when there are multiple PUCCHs transmitted in time sloti−1, g(i−1) is equal to an accumulated value of closed-loop powercontrol of the last PUCCH within time slot i−1. For example, there aretwo PUCCH transmissions within time slot i−1, according to time divisionmultiplexing. The first PUCCH is denoted as PUCCH-1. The second PUCCH isdenoted as PUCCH-2. For PUCCH-1, an accumulated value of closed-looppower control is denoted as g_1(i−1). For PUCCH-2, an accumulated valueof closed-loop power control is denoted as g_2(i−1). And then, g(i−1) isequal to g_2(i−1).

${{g\_}1(i)} = {{g\left( {i - 1} \right)} + {\underset{m \neq m_{i}}{\sum\limits_{m = 0}^{M - 1}}{\delta_{PUCCH}{\left( {i - k_{m}} \right).}}}}$

The M here refers to the total number of power control commands pointingto time slot i. For example, M is equal to 3. Power control commandsTPC-0, TPC-1 and TPC-2 are respectively received at time slots i−k0,i−k1 and i−k2. On the basis of the power control commands TPC-0, TPC-1and TPC-2, δ_(PUCCH)(i−k0), δ_(PUCCH)(i−k1) and δ_(PUCCH)(i−k2) arerespectively calculated. However, m_(i) refers to that, the TPC commandat time slot i-m_(i) cannot meet the requirements of delay processing.At this time, the TPC command of time slot i-m_(i) cannot be applied tocalculate g_1(i).

For example, as shown in FIG. 11 , a long PUCCH is denoted as PUCCH-1. Ashort PUCCH is denoted as PUCCH-2, which are transmitted in time slot n.The power control commands TPC-0, TPC-1 and TPC-2 are respectivelyreceived at time slots n, n−1 and n−2. For the long PUCCH-1, the powercontrol commands TPC-1 and TPC-2 at time slots n−1 and n−2 meet thedelay requirements. Power adjustment values δ_(PUCCH)(n−1) andδ_(PUCCH)(n−2) my be obtained, based on TPC-1 and TPC-2. Beforereceiving the power control command TPC-0 at time slot n, a UE hasalready transmitted the long PUCCH-1. Thus, the power adjustment valueδ_(PUCCH)(n) cannot be used for calculating accumulated value g_1(n) ofclosed-loop power control of PUCCH-1, in which δ_(PUCCH)(n) is obtainedbased on power control command TPC-0 of time slot n. Thus,g_1(n)=g(n−1)+δ_(PUCCH)(n−1)+δ_(PUCCH)(n−2). For the short PUCCH-2, thepower control commands TPC-0, TPC-1 and TPC-2 of time slots n, n−1 andn−2 meet the delay requirements. And Power adjustment valuesδ_(PUCCH)(n), δ_(PUCCH)(n−1) and δ_(PUCCH)(n−2) may be obtained, basedon TPC-0, TPC-1 and TPC-2. And then, an accumulated value of closed-looppower control may be calculated by using these power adjustment values.Therefore, g_2(n)=g(n−1)+δ_(PUCCH)(n−1)+δ_(PUCCH)(n−2) However, g(n) isequal to g_2(n), in which g(n) is used for calculating an accumulatedvalue of closed-loop power control at time slot n+1. Foregoing TPCcommand may be a TPC command in DCI of PDCCH scheduling PDSCH, and maybe a TPC command in common DCI of UE-group.

A Second Method:

When there are at least two PUCCHs transmitted within one time slot,according to time division multiplexing, for each PUCCH, an accumulatedvalue g(i) of closed-loop power control is uniformly calculated. Forexample, there are two PUCCH transmissions within time slot i, accordingto time division multiplexing. The first PUCCH is denoted as PUCCH-1.The second PUCCH is denoted as PUCCH-2. For PUCCH-1 and PUCCH-2, therespective accumulated value of closed-loop power control is the same,which is denoted as g(i). δ_(PUCCH) is a power adjustment value, whichis obtained based on a TPC command, and g(i) may be calculated, based onformula

${g(i)} = {{g\left( {i - 1} \right)} + {\sum\limits_{m = 0}^{M - 1}{{\delta_{PUCCH}\left( {i - k_{m}} \right)}.}}}$

Specifically,

${g(i)} = {{g\left( {i - 1} \right)} + {\underset{m \neq m_{i}}{\sum\limits_{m = 0}^{M - 1}}{{\delta_{PUCCH}\left( {i - k_{m}} \right)}.}}}$

Here, M is the total number of power control commands pointing to timeslot i. For example, M is equal to 3. Power control commands TPC-0,TPC-1 and TPC-2 are respectively received at time slots i−k0, i−k1 andi−k2. On the basis of power control commands TPC-0, TPC-1 and TPC-2,δ_(PUCCH)(i−k0) δ_(PUCCH)(i−k1) and δ_(PUCCH)(i−k2) are respectivelycalculated. However, m_(i) refers to as follows. A TPC command at timeslot i-m_(i) does not meet the delay processing requirements of at leastone PUCCH power control. The TPC command of time slot i-m_(i) cannot beapplied to calculate g(i). For example, as shown in FIG. 11 , a longPUCCH is denoted as PUCCH-1. A short PUCCH is denoted as PUCCH-2, whichare transmitted in time slot n. The power control commands TPC-0, TPC-1and TPC-2 are respectively received at time slots n, n−1 and n−2. Forthe long PUCCH-1, the power control commands TPC-1 and TPC-2 at timeslots n−1 and n−2 meet the delay requirements. However, before receivingthe power control command TPC-0 at time slot n, a UE has already startedto transmit the long PUCCH-1. Thus, the power adjustment valueδ_(PUCCH)(n) cannot meet the delay requirements of power control ofPUCCH-1, and δ_(PUCCH)(n) is obtained based on the power control commandTPC-0 at time slot n. For the short PUCCH-2, the power control commandsTPC-0, TPC-1 and TPC-2 at time slots n, n−1 and n−2 meet the delayrequirements of power control of PUCCH-2. That is, only the powercontrol commands TPC-1 and TPC-2 at time slots n−1 and n−2simultaneously meet the delay requirements of power control of PUCCH-1and PUCCH-2. However, the power control command TPC-0 at time slot ndoes not meet the delay requirements of power control of PUCCH-1. Thus,the power adjustment values δ_(PUCCH)(n−1) and δ_(PUCCH)(n−2) are usedfor calculating the accumulated value of closed-loop power control,g(n)=g(n−1)+δ_(PUCCH)(n−1)+δ_(PUCCH)(n−2) δ_(PUCCH)(n−1) andδ_(PUCCH)(n−2) are obtained by using TPC-1 and TPC-2.

A Third Embodiment

In a NR communication system, the following scene may occur. A first DCItransmitting a first TPC command is prior to a second DCI transmitting asecond TPC command, while a first PUCCH transmission applying the firstTPC command to control power is after a second PUCCH transmissionapplying the second TPC command to control power. For example, DCI-1transmitting the TPC command TPC-1 is transmitted at time slot n−k−1.DCI-2 transmitting the TPC command TPC-2 is transmitted at time slotn−k. PUCCH-1 is transmitted at time slot n+p, and PUCCH-1 adopts TPC-1to control power. PUCCH-2 is transmitted at time slot n, and PUCCH-2adopts TPC-2 to control power, as shown in FIG. 12 .

At this time, there are the following methods to control power of PUCCH.

A First Method:

For the power control of PUCCH transmitted in time slot n, the powercontrol of PUCCH is performed, by using a TPC command (it is requiredthat the TPC was not used for calculation of accumulated value ofprevious closed-loop power control, on the basis of the TPC timing, theTPC command of DCI transmitted in time slot n−k_(m) is applied to powercontrol of PUCCH transmitted in time slot n) of DCI transmitted in timeslot n−k_(m) and a TPC command (it is required that the TPC was not usedfor calculation of accumulated value of previous closed-loop powercontrol, on the basis of the TPC timing, the TPC command of DCItransmitted before time slot n−k_(m) is applied to power control ofPUCCH transmitted in time slot n+p, p is a positive integer greater thanor equal to 1) of DCI transmitted before time slot n−k_(m).

Specifically, as shown in FIG. 12 , DCI-1 transmitting the TPC commandTPC-1 is transmitted in time slot n−k−1, and DCI-2 transmitting the TPCcommand TPC-2 is transmitted in time slot n−k. On the basis of the TPCtiming, PUCCH-1 is transmitted in time slot n+p, and PUCCH-1 adoptsTPC-1 to control power. PUCCH-2 is transmitted in time slot n, andPUCCH-2 adopts TPC-2 to control power. At this time, an accumulatedvalue of closed-loop power control of PUCCH-2 transmitted in time slot nis calculated, by using power adjustment values δ_(PUCCH)(1) andδ_(PUCCH)(2), that is, g(n)=g(n−1)+δ_(PUCCH)(1)+δ_(PUCCH)(2).δ_(PUCCH)(1) and δ_(PUCCH)(2) are obtained, by using TPC-1 and TPC-2.Since TPC-2 is a TPC command of DCI transmitted in time slot n−k_(m),TPC-2 is a TPC used for power control of PUCCH transmitted in time slotn (the TPC was not used for calculation of accumulated value of previousclosed-loop power control), while TPC-1 is a TPC command of DCItransmitted before time slot n−k_(m). Besides, on the basis of the TPCtiming, the TPC command of DCI transmitted before time slot n−k_(m) is aTPC (the TPC was not used for calculation of accumulated value ofprevious closed-loop power control), which is used for power control ofPUCCH transmitted after time slot n. Thus, on the basis of the previousmethod, an accumulated value of closed-loop power control of time slot nis calculated, by using power adjustment values δ_(PUCCH)(1) andδ_(PUCCH)(2). δ_(PUCCH)(1) and δ_(PUCCH)(2) are obtained, by using TPC-1and TPC-2. The accumulated value of closed-loop power control of PUCCH-1transmitted in time slot n+p is calculated, by using the formulag(n+p)=g(n+p−1). That is, the power adjustment value δ_(PUCCH)(1) is notused, and δ_(PUCCH)(1) is obtained by using TPC-1. Since TPC-1 is a TPCcommand of DCI transmitted before time slot n−k_(m), and is a TPC usedfor power control of PUCCH-1 transmitted in time slot n+p, however,TPC-1 was used for calculation of accumulated value of previousclosed-loop power control of PUCCH-2, TPC-1 is not used for calculationof accumulated value of closed-loop power control of PUCCH-1.

Thus, calculations of a BS for transmitting power control command areperformed according to time sequence. That is, TPC-2 is calculated,based on TPC-1. Thus, PUCCH-2 adopts TPC-1 and TPC-2 to control power.

The foregoing TPC timing refers to a timing, which is between DCItransmitting a TPC command and a PUCCH adopting the TPC to controlpower. For example, regarding DCI including a TPC command transmitted intime slot n−k, regarding a PUCCH adopting the TPC command to controlpower, and the PUCCH is transmitted in time slot n, a time correspondingbetween the PUCCH and the DCI is referred to as the TPC timing.

A Second Method:

For power control of a PUCCH transmitted in time slot n, and DCItransmitted in time slot n−k_(m), on the basis of a TPC timing, a TPCcommand of DCI transmitted in time slot n−k_(m) is a TPC, which is usedfor power control of PUCCH transmitted in time slot n. An accumulatedvalue of closed-loop power control of the PUCCH is calculated, by usingthe TPC of DCI transmitted in time slot n−k_(m). Specifically, as shownin FIG. 12 , DCI-1 transmitting a TPC command TPC-1 is transmitted intime slot n−k−1, and DCI-2 transmitting a TPC command TPC-2 istransmitted in time slot n−k. On the basis of the TPC timing, PUCCH-1 istransmitted in time slot n+p, and PUCCH-1 adopts TPC-1 to control power.PUCCH-2 is transmitted in time slot n, and PUCCH-2 adopts TPC-2 tocontrol power. The PUCCH-1 adopts TPC-1 to calculate an accumulatedvalue of closed-loop power control, in which TPC-1 is transmitted byDCI-1 in time slot n−k−1. The PUCCH-2 adopts TPC-2 to calculate theaccumulated value of closed-loop power control, in which TPC-2 istransmitted by DCI-2 in time slot n−k.

A Fourth Embodiment

In a NR communication system, multiple PUCCH transmissions within onetime slot are introduced. For example, there are two PUCCH transmissionswithin a time slot n, according to time division multiplexing. The firstPUCCH is denoted with PUCCH-1. The second PUCCH is denoted with PUCCH-2.At this time, a time slot is taken as a unit in a timing. The timing isbetween DCI transmitting TPC and an uplink UCI transmission, whichadopts the TPC to control power. For example, the DCI carrying TPC istransmitted in time slot n. The uplink UCI is transmitted in time slotn+k, and the uplink UCI adopts the TPC to control power.

For the TPC in the UE-group common DCI, when the UE-group common DCIcarrying TPC is transmitted in time slot n, the TPC is applied in timeslot n+k to control power. Besides, when there are multiple PUCCHtransmissions in time slot n+k, the TPC command is applied to powercontrol of the first PUCCH in time slot n+k. For example, there are twoPUCCH transmissions in time slot n+k. The first PUCCH is denoted withPUCCH-1. The second PUCCH is denoted with PUCCH-2. As shown in FIG. 10 ,the TPC command is applied to the power control of PUCCH-1.

For the TPC command in DL DCI scheduling PDSCH, the TPC command isapplied to power control of PUCCH of HARQ-ACK, in which the HARQ-ACK isgenerated from the transmitted PDSCH. For example, when DCI transmittedin time slot n includes TPC, in which the DCI schedules the PDSCH, theHARQ-ACK generated from transmitted PDSCH is transmitted by PUCCH intime slot n+k, the TPC included by DCI scheduling PDSCH is applied topower control of PUCCH of HARQ-ACK, in which the HARQ-ACK is generatedfrom transmitted PDSCH. For example, there are two PUCCH transmissionsin time slot n+k, according to time division multiplexing, the firstPUCCH is denoted with PUCCH-1. The second PUCCH is denoted with PUCCH-2.As shown in FIG. 10 , the HARQ-ACK generated from the PDSCH istransmitted in PUCCH-2. The TPC command is applied to power control ofPUCCH-2.

Corresponding to the foregoing method, the present disclosure alsoprovides a device for uplink power control. A preferred structure of thedevice is shown in FIG. 13 , including a timing determining module and apower control module.

The timing determining module is configured to determine a timing, whichis between a power control command and a PUCCH adopting the powercontrol command to control power.

On the basis of the determined timing, the power control module isconfigured to adjust transmission power of the PUCCH, according to thepower control command.

The foregoing is only preferred embodiments of the present disclosure,which is not for use in limiting the present disclosure. Anymodifications, equivalent substitutions and improvements made within thespirit and principle of the present disclosure, should be covered by theprotection scope of the present disclosure.

In order to facilitate better understanding of the technical solutionsof the present disclosure by those skilled in the art, the technicalsolutions of the disclosure will be described clearly and completelyhereinafter in conjunction with the drawings accompanying the disclosedembodiments.

Some processes described in the description, claims and the drawings ofthe present disclosure may comprise a plurality of operations that aredescribed in a certain order. However, it should be understood thatthese operations may be executed in an order rather than the order inwhich they are described herein or executed in parallel. The referencenumbers indicating the operations, such as 601 and 602, are merely usedfor distinguishing different operations, and the reference numbersthemselves do not represent any execution order. In addition, theseprocesses may comprise more or less operations, and these operations maybe executed sequentially or in parallel. It is to be noted that the wordsuch as “first” and “second” are used for distinguishing differentmessages, devices, modules or the like, which neither indicate anysequences nor define different types.

Technical solutions of the disclosed embodiments will be explainedclearly and completely hereinafter in conjunction with the accompanyingdrawings in the disclosed embodiments. Obviously, the embodimentsdescribed herein are only some of rather than all of the disclosedembodiments of the present disclosure. Any other embodiments obtained bythose skilled in the art based on the disclosed embodiments without anycreative work will fall into the protection scope of the presentdisclosure.

Reference is now made to FIG. 15 which illustrates a method fortransmitting uplink control information (UCI) according to the presentdisclosure. The method comprises the steps of:

Step 601: determining a transmission waveform for a PUSCH, and

Step 602: transmitting UCI and data based on the determined transmissionwaveform for the PUSCH.

In the present disclosure, two waveforms, which are CP-OFDM and SC-FDM,may be used as waveforms for uplink transmission. In other words, bothCP-OFDM and SC-FDM may be used as transmission waveforms for a PUCCH ora PUSCH.

Examples are provided hereinafter to illustrate how to determine, by aUE, a transmission waveform for a PUCCH and that for a PUSCH. Same orsimilar content among respective examples will not be repeated in detailherein.

Example 1

In this example, there is no correlation between a transmission waveformfor a PUCCH determined by a UE and a transmission waveform for a PUSCHdetermined by the UE.

Specifically, the UE may receive dynamic indication informationtransmitted from a base station, and then determine respective waveformsto be used to transmit the PUCCH and the PUSCH according to the dynamicindication information. The dynamic indication information may be, forexample, an indication from system information (that is, informationcontaining a master information blocks (MIB) and a system informationblock (SIB)), configuration information from higher-layer signaling oran indication from physical layer signaling. The base station may useindividual dynamic indication information that is independent from eachother to indicate which waveforms shall be used by the UE to transmitthe PUCCH and the PUSCH respectively. Meanwhile, the UE may alsodetermine respective waveforms to be used to transmit the PUCCH and thePUSCH according to a predefined rule such as an agreement in a protocol.

For example, the base station may use one bit in the system informationor in the physical layer signaling to indicate that a CP-OFDM waveformor an SC-FDM waveform shall be used for the PUCCH. For example, theCP-OFDM waveform will be used for the PUCCH when the value of the bit is0, and the SC-FDM waveform will be used for the PUCCH when the value ofthe bit is 1.

Optionally, the UE may use the SC-FDM waveform to transmit the PUCCHaccording to a predefined rule after initial access. Alternatively, theUE may use the SC-FDM waveform to transmit the PUCCH according to apredefined rule until the transmission waveform for the PUCCH isconfigured by the higher-layer signaling.

Example 2

In this example, the UE determines a same transmission waveform for bothof the PUCCH and the PUSCH. That is, the UE may use either CP-OFDM orSC-FDM for both of the PUCCH and the PUSCH.

Specifically, a UE may receive dynamic indication informationtransmitted by a base station, and then determine a waveform to be usedto transmit the PUCCH and the PUSCH according to dynamic indicationinformation. The dynamic indication information may be, for example, anindication from system information, configuration information fromhigher-layer signaling or an indication from physical layer signaling.The base station may use same dynamic indication information to indicatewhich waveform shall be used by the UE to transmit the PUCCH and thePUSCH.

For example, the base station may use one bit in the system informationto indicate that the CP-OFDM waveform or the SC-FDM waveform shall beused for both of the PUCCH and the PUSCH. For example, the CP-OFDMwaveform will be used for both of the PUCCH and the PUSCH when the valueof the bit is 0, and the SC-FDM waveform will be used for both of thePUCCH and the PUSCH when the value of the bit is 1. Similarly, the basestation may also use higher-layer signaling to configure the waveformused for frequency-division multiplexed PUCCH and PUSCH to be CP-OFDM orSC-FDM.

Example 3

In this example, there is no correlation between a transmission waveformfor a PUCCH determined by a UE and that for a PUSCH determined by theUE. The UE determines the transmission waveform for the PUCCH accordingto type of the PUCCH.

Type of a PUCCH is introduced now. A PUCCH may be classified as a firsttype of PUCCH or a second type of PUCCH according to differentclassification criteria. For example, a PUCCH may be classifiedaccording to whether it is exclusively used by a single UE or shared bya plurality of UEs. In such a circumstance, the first type of PUCCH maybe referred to as shared PUCCH (for example, PUCCH format 3 and PUCCHformat 5 in the LTE system), which means that one physical resourceblock (PRB) is shared by a plurality of UEs and the plurality of UEs cantransmit their respective PUCCHs on the shared physical resource block.The second type of PUCCH may be referred to as exclusive PUCCH (forexample, PUCCH format 4 in the LTE system), which means that one PRB isexclusively used by one UE and only the one UE can transmit a PUCCH onthe one physical resource block.

In addition, a PUCCH may be classified according to whether the lengththereof is larger than a certain value. In such a circumstance, thefirst type of PUCCH may be referred to as a long PUCCH, the number ofOFDM symbols occupied by which is larger than N (for example, N is equalto 2). The second type of PUCCH may be referred to as a short PUCCH, thenumber of OFDM symbols occupied by which is less than or equal to N.

The UE may determine the type of a PUCCH, and then determine thetransmission waveform for the PUCCH according to the type thereof. Forexample, the transmission waveform for the first type of PUCCH may bedetermined according to a predefined rule, while the transmissionwaveform for the second PUCCH may be determined according to dynamicindication information from a base station. For example, the UE maydetermine that the SC-FDM waveform is used to transmit the first type ofPUCCH, and the base station may use one bit in the system information orin the physical layer signaling to indicate that the CP-OFDM waveform orthe SC-FDM waveform is used to transmit the second type of PUCCH. Forexample, the CP-OFDM waveform is used for the second type of PUCCH whenthe value of the one bit value is 0, and the SC-FDM waveform is used forthe second type of PUCCH when the value of the one bit is 1. Meanwhile,the transmission waveform for the PUSCH may be independently determinedby receiving dynamic indication information from the base station.

Example 4

Example 4 is different from example 3 only in that the UE determineswaveforms for transmitting a first type of PUCCH and a second type ofPUCCH respectively by receiving dynamic indication informationtransmitted from the base station. The base station uses individualdynamic indication information that is independent from each other torespectively indicate which waveform will be used by UE to transmit thefirst PUCCH and which waveform will be used by UE to transmit the secondPUCCH.

Example 5

Example 5 is different from example 3 only in that the UE determines thewaveforms that are used to transmit a first PUCCH and a second PUCCHrespectively according to a predefined rule.

Example 6

In this example, there is no correlation between a transmission waveformfor a PUCCH determined by a UE and a transmission waveform for a PUSCHdetermined by the UE. The UE determines the transmission waveform forthe PUCCH according to the type of the PUCCH.

In this example, a PUCCH is classified as a first type of PUCCH or asecond type of PUCCH according to the number of PRBs occupied by thePUCCH. The number of PRBs occupied by the first type of PUCCH is lessthan or equal to M (for example, M is 2), and the number of PRBsoccupied by the second type of PUCCH is larger than M. The transmissionwaveform for the PUCCH may be determined according to the number of PRBsthat it occupies.

For example, the UE determines the transmission waveform (for example,SC-FDM) for the first type of PUCCH according to a predefined rule, anddetermines the transmission waveform for the second type of PUCCHaccording to dynamic indication information from the base station.Alternatively, the UE may independently determine the transmissionwaveform for the first type of PUCCH and that for the second type ofPUCCH respectively according to first dynamic indication informationfrom the base station. The transmission waveform for the PUSCH may beindependently determined by receiving second dynamic indicationinformation from the base station.

Example 7

In this example, there is no correlation between a transmission waveformfor a PUCCH determined by a UE and a transmission waveform for a PUSCHdetermined by the UE. The UE determines the transmission waveform forthe PUCCH according to the type of the PUCCH.

A PUCCH may be classified as a first type of PUCCH or a second type ofPUCCH according to the manner in which it occupies physical resource.The physical resource occupied by the first type of PUCCH is continuousPRBs, which means that the occupied physical resource is centralized.The physical resource occupied by the second type of PUCCH isdiscontinuous PRBs, which means that the occupied physical resource isdiscrete.

The UE determines the transmission waveform (for example, SC-FDM) forthe first type of PUCCH and the transmission waveform (for example,CP-OFDM) for the second type of PUCCH according to a predefined rule.The transmission waveform for the PUSCH may be independently determinedby receiving dynamic indication information from the base station.

Example 8

In this example, there is no correlation between a transmission waveformfor a PUCCH determined by a UE and a transmission waveform for a PUSCHdetermined by the UE. In all cases, the UE uses the SC-FDM waveform totransmit the PUCCH invariably (that is, as prescribed by a predefinedrule), while the transmission waveform for a PUCSCH is independentlydetermined by receiving dynamic indication information from a basestation.

Example 9

In this example, there is no correlation between a transmission waveformfor a PUCCH determined by a UE and a transmission waveform for a PUSCHdetermined by the UE. The UE determines a transmission waveform for aPUSCH according to type of the PUSCH.

A PUSCH may be classified as a first type of PUSCH or a second type ofPUSCH according to whether downlink control information (DCI) used forscheduling the PUSCH by the base station supports spatial multiplexingor not. The DCI corresponding to the first type of PUSCH supportsspatial multiplexing, and the DCI corresponding to the second type ofPUSCH does not support spatial multiplexing.

The UE determines the transmission waveform for the first type of PUSCHto be CP-OFDM and determines the transmission waveform for the secondtype of PUSCH according to dynamic indication information from the basestation. If the dynamic indication information from the base station isphysical layer signaling, one bit therein may be used to specificallyindicate the transmission waveform for the second type of PUSCH. Thedynamic indication information may also be combined with otherinformation in the DCI to indicate the transmission waveform for thesecond type of PUSCH. For example, it may be combined with informationindicating resource allocation scheme to indicate the transmissionwaveform for the second type of PUSCH.

Example 10

Special situations will be described in this example.

If a UE determines that CP-OFDM waveform is used for a PUSCH, the PUSCHwill not use frequency hopping within a slot. Specifically, becauseCP-OFDM allows transmission resource for the PUSCH to be distributeddiscretely in frequency domain, sufficient frequency-domain diversitygain can be obtained and it is not necessary to use frequency hopping toobtain additional frequency-domain diversity gain.

If the UE determines that SC-FDM waveform is used for a PUSCH, the PUSCHcan use frequency hopping within a slot. Specifically, becausetransmission resource for the PUSCH is substantially continuous infrequency-domain, sufficient frequency-domain diversity gain cannot beobtained and it may be necessary to use frequency hopping within a slotto obtain additional frequency-domain diversity gain.

As described hereinbefore, step 102 comprises transmitting UCI and databased on the determined transmission waveform for the PUSCH.

Examples are provided hereinafter to illustrate how the UE transmits UCIand data according to the transmission waveforms for PUCCH and PUSCHdetermined by the UE. Same or similar content among respective exampleswill not be repeated in detail herein.

Because a PUCCH may be classified as a long PUCCH or a short PUCCH and aPUSCH may also be classified as a long PUSCH or a short PUSCH, it may beconfigured by a higher-layer signaling whether a UE can transmit a PUCCHand a PUSCH simultaneously. A UE may configure whether different typesof PUCCHs and different types of PUSCHs can be transmittedsimultaneously by receiving at least one independent higher-layersignaling. Different types of PUCCHs comprise the long PUCCH and theshort PUCCH, and different types of PUSCHs comprise the long PUSCH andthe short PUSCH. For example, the UE may determine whether the longPUCCH and the long PUSCH can be transmitted simultaneously by receivinga higher-layer signaling 1, and the UE may determine whether the shortPUCCH and the short PUSCH can be transmitted simultaneously by receivinga higher-layer signaling 2. Alternatively, the UE may determines whetherthe long PUCCH and the long PUSCH can be transmitted simultaneously,whether the long PUCCH and the short PUSCH can be transmittedsimultaneously and whether the short PUCCH and the long PUSCH can betransmitted simultaneously by receiving a higher-layer signaling 1, andthe UE may determine whether the short PUCCH and the short PUSCH can betransmitted simultaneously by receiving a higher-layer signaling 2. Byindependently configuring whether different types of PUCCHs anddifferent types of PUSCHs can be transmitted simultaneously, differentrequirements on power by different types of PUCCHs and different typesof PUSCH as well as different requirements on the performance ofdifferent types of PUCCH and different types of PUSCH may be met.

Example 1

A process of transmitting UCI and data by a UE in the case that the UEdetermines that the CP-OFDM waveform will be used to transmit the PUSCHand the UE can transmit PUCCH and PUSCH simultaneously (i.e., within asame slot), is described in this example. In this example, the UE cantransmit the PUCCH and the PUSCH simultaneously in one or more servingcells.

The UE transmits UCI on the PUCCH and transmits data on the PUSCH.Specifically, the UE transmits a plurality of PUCCHs simultaneously inone subframe and each PUCCH transmits HARQ-ACK, CSI or SR correspondingthereto. That is, HARQ-ACK, CSI and SR are each transmitted on itscorresponding PUCCH respectively. For example, when the UE needs totransmit HARQ-ACK and CSI in a subframe n, the UE transmit HARQ-ACK on aPUCCH for HARQ-ACK and transmit CSI on a PUCCH for CSI.

Because a problem of PAR increasing due to simultaneous transmission ona plurality of channels may be solved by using OFDM as transmissionwaveform, as much transmission resource as possible is used in thisexample by using CP-OFDM waveform to transmit both the PUCCH and thePUSCH so as to improve transmission performance. Power control of thePUCCH and that of the PUSCH are computed respectively, and thetransmission power for the PUCCH and that of the PUSCH may be different.If the total power required for simultaneously transmitting one or morePUCCHs and a PUSCH is larger than a maximum power allowed by the UE, theUE will reduce the power for the PUCCH(s) and the PUSCH according totheir respective priorities in power allocation in an order from lowerpriority to higher priority or stops transmission, until the sum of theadjusted transmission power is less than or equal to the maximum powerallowed by the UE.

Example 2

A process of transmitting UCI and data by a UE in the case that the UEdetermines that the CP-OFDM waveform will be used to transmit the PUSCHand the UE can transmit PUCCH and PUSCH simultaneously (i.e., within asame slot), is described in this example. In this example, the UE cantransmit the PUCCH and the PUSCH simultaneously in one or more servingcells.

The UE transmits UCI on the PUCCH and transmits data on the PUSCH.Specifically, the UE simultaneously transmits a plurality of PUCCHs inone subframe, which may comprise respective PUCCHs for HARQ-ACK, CSI andSR. When the UE transmits UCI, two or three selected from HARQ-ACK, CSIand SR are jointly encoded into content to be transmitted, which will betransmitted on one PUCCH. Alternatively, the content to be transmittedmay be taken as a whole and distributed on a plurality of PUCCHs so asto be transmitted. For example, when the UE need to transmit HARQ-ACKand CSI in a subframe n, it may encode HARQ-ACK and CSI jointly intocontent to be transmitted and distribute the whole content to betransmitted on the PUCCH for HARQ-ACK and on the PUCCH for CSI so as tobe transmitted simultaneously, as can be seen in FIG. 16 .

Alternatively, when transmitting UCI, the UE may select and individuallyencode two or three from HARQ-ACK, CSI and SR respectively. Theindividually encoded ones may be taken as a whole, and transmitted onone PUCCH or distributed and transmitted on a plurality of PUCCHs. Forexample, when the UE needs to transmit HARQ-ACK and CSI in a subframe n,it individually encodes HARQ-ACK and CSI respectively, take theindividually encoded HARQ-ACK and CSI as a whole and distribute the sameon the PUCCH for HARQ-ACK and on the PUCCH for CSI so as to transmit thesame simultaneously. In this situation, the PUCCH resource allocated toHARQ-ACK and CSI respectively is computed according to a number of bitsoccupied by HARQ-ACK and a number of bits occupied by CSI as well astheir respective resource allocation factors. The power control of thePUCCH and the PUSCH is computed respectively, and the transmission powerfor the PUCCH and that for the PUSCH may be different.

The format of the PUCCH resource for HARQ-ACK may be determinedaccording to the number of bits occupied by HARQ-ACK, and the UE maycompute a number of bits occupied by PUCCH by receiving indication froma higher-layer signaling or a physical layer signaling. The format ofthe PUCCH resource for CSI may be determined according to the number ofbits occupied by CSI.

Example 3

A process of transmitting UCI and data by a UE in the case that the UEdetermines that the CP-OFDM waveform will be used to transmit the PUSCHand the UE can transmit PUCCH and PUSCH simultaneously (i.e., within asame slot), is described in this example. In this example, the UE cantransmit the PUCCH and the PUSCH simultaneously in one or more servingcells.

The UE transmits UCI on the PUCCH and transmits data on the PUSCH.Specifically, the UE simultaneously transmits a plurality of PUCCHs inone subframe, which may comprise respective PUCCHs for HARQ-ACK, CSI andSR. Specifically, the UE transmits UCI according to whether the PUCCH isan exclusive PUCCH or a shared PUCCH. If a plurality of PUCCHs areexclusive PUCCHs, the UE can select and jointly encoded two or threefrom HARQ-ACK, CSI and SR into content to be transmitted. The content tobe transmitted will be transmitted on one PUCCH, or taken as a whole anddistributed on a plurality of PUCCHs so as to be transmitted. Similarly,if a plurality of PUCCHs are exclusive PUCCHs, the UE can select two orthree from HARQ-ACK, CSI and SR and individually encode the selectedones respectively. The individually encoded ones may be taken as a wholeand transmitted on one PUCCH or distributed and transmitted on aplurality of PUCCHs simultaneously. If the PUCCH is a shared PUCCH, theUE selects one from HARQ-ACK, CSI and SR to be transmitted thereon.

For example, when the UE needs to transmit HARQ-ACK and CSI in asubframe n, it may jointly encode them into content to be transmitted.The content to be transmitted may be taken as a whole and distributed ontwo exclusive PUCCHs so as to be transmitted simultaneously. For anotherexample, when the UE needs to transmit HARQ-ACK and CSI in a subframe n,it may individually encode HARQ-ACK and CSI respectively. Theindividually encoded HARQ-ACK and CSI may be taken as a whole anddistributed on two exclusive PUCCHs so as to be transmittedsimultaneously. In this situation, the PUCCH resource allocated toHARQ-ACK and CSI respectively may be computed according to a number ofbits occupied by HARQ-ACK and a number of bits occupied by CSI and theirrespective resource allocation factors. The power control for the PUCCHand the PUSCH may be computed respectively, and the transmission powerfor the PUCCH and that for the PUSCH may be different.

The format of the PUCCH resource for the HARQ-ACK may be determinedaccording to the number of bits occupied by HARQ-ACK, and the UE maycompute a number of bits occupied by the PUCCH by receiving indicationfrom a higher-layer signaling or a physical layer signaling. The formatof the PUCCH resource for CSI may be determined according to the numberof bits occupied by CSI.

Example 4

A process of transmitting UCI and data by a UE in the case that the UEdetermines that the CP-OFDM waveform will be used to transmit the PUSCHand the UE can transmit PUCCH and PUSCH simultaneously (i.e., within asame slot), is described in this example. In this example, the UE cantransmit the PUCCH and the PUSCH simultaneously in one or more servingcells.

A UE can transmit UCI and data on either a PUCCH or a PUSCH. The UEsimultaneously transmits a plurality of PUCCHs in one subframe, whichmay comprise respective PUCCHs for HARQ-ACK, for CSI and for SR.Specifically, the UE transmits UCI according to type of a PUCCH, i.e.,whether the PUCCH is an exclusive PUCCH or a shared PUCCH. If the PUCCHis an exclusive PUCCH, UCI and data may be transmitted on the PUCCH. Ifthe PUCCH is a shared PUCCH, only UCI may be transmitted on the PUCCHand no data may be transmitted thereon.

When both UCI and data are transmitted on each of the PUCCH and thePUSCH, the density of the demodulation reference signal (DMRS) adoptedby the PUCCH and that of the DMRS adopted by the PUSCH are same. The UEtakes the PUCCH resource and the PUSCH resource as a whole (i.e., astotal resource), and allocates the total resource to UCI and data to betransmitted according to the number of bits occupied by UCI to betransmitted and the number of bits occupied by data to be transmitted aswell as the respective resource allocation factors of UCI and data.

Example 5

A process of transmitting UCI and data by a UE in the case that the UEdetermines that the CP-OFDM waveform will be used to transmit the PUSCHand the UE can transmit PUCCH and PUSCH simultaneously (i.e., within asame slot), is described in this example. In this example, the UE cantransmit the PUCCH and the PUSCH simultaneously in one or more servingcells.

A UE may transmit UCI and data either on a PUCCH or on a PUSCH. The UEsimultaneously transmits a plurality of PUCCHs in one subframe, whichmay comprise respective PUCCHs for HARQ-ACK, for CSI and for SR.Specifically, if there are a plurality of available PUCCHs for the UE,of which some are exclusive PUCCHs and others are shared PUCCHs, the UEtransmits UCI and data on the exclusive PUCCHs, transmits UCI on theshared PUCCHs and transmits UCI and data on the PUSCH.

For example, the UE may take UCI and data to be transmitted as a wholeand distributes them on the PUSCH and one or more exclusive PUCCHs so asto be transmitted. If there is no available exclusive PUCCH resource forthe UE, the UE uses the PUSCH to transmit UCI and data.

Specifically, if the UE has two PUCCHs used for CSI and HARQ-ACKrespectively, and the PUSCH is available. The PUCCH for CSI is anexclusive PUCCH, and the PUCCH for HARQ-ACK is a shared PUCCH. When theUE needs to transmit CSI, HARQ-ACK and data, it uses the PUCCH forHARQ-ACK to transmit the HARQ-ACK, takes CSI and data as a whole anddistributed them on the PUSCH and the PUCCH for CSI so as to betransmitted.

When UCI and data are transmitted on each of the PUCCH and on the PUSCH,the density of DMRS adopted by the PUCCH and that of DMRS adopted by thePUSCH are same. The UE takes the PUCCH resource and the PUSCH resourceas a whole (i.e., as total resource), and allocates the total resourceto UCI and data to be transmitted according to the number of bitsoccupied by UCI to be transmitted and the number of bits occupied bydata to be transmitted as well as the respective resource allocationfactors of UCI and data. For example, in the case that the density ofDMRS adopted by the PUSCH and that of DMRS adopted by the PUCCH for CSIare same as described in above example, the UE takes the PUSCH resourceand the PUCCH resource for CSI as total resource, and allocates thetotal resource to UCI and data according to the number of bits occupiedby UCI and the number of bits occupied by data as well as the respectiveresource allocation factors of the UCI and data.

Example 6

When a UE uses a CP-OFDM waveform to transmit a PUSCH, the UE maydetermine whether a PUCCH and a PUSCH can be transmitted simultaneouslyby receiving a higher-layer signaling or it may be directly determinedby a predefined rule that the PUCCH and the PUSCH can be transmittedsimultaneously by the UE. Cases that UE can simultaneously transmit thePUCCH and the PUSCH have been provided in examples 1-5. In this example,a process in which the UE transmits UCI and data in the case that the UEcannot transmit the PUCCH and the PUSCH simultaneously (i.e., within asame slot), will be described.

If the UE can only transmit PUSCH, it transmits UCI and data on thePUSCH. If the UE can only transmit PUCCH, it transmits UCI on the PUCCHand stops transmitting data.

Example 7

A process in which the UE transmits UCI and data in the case that the UEdetermines that a SC-FDM waveform is used for transmitting PUSCH, willbe described in this example.

If it is determined that the UE can transmit a PUCCH and a PUSCHsimultaneously (i.e., within a slot) according to configurationinformation from a higher-layer signaling, the UE simultaneouslytransmits UCI on the PUCCH and data on the PUSCH respectively. Forexample, if there is no UCI to be transmitted and only data is to betransmitted, the UE transmits data on the PUSCH; if the UE needs tosimultaneously transmit CSI and PUSCH data, it transmits CSI on thePUCCH and transmits data on the PUSCH; and if the UE needs tosimultaneously transmit HARQ-ACK/SR and data, it transmits HARQ-ACK/SRon the PUCCH and transmits data on the PUSCH. It is to be noted thatthere are exceptions: if the UE needs to simultaneously transmit CSI,HARQ-ACK and data, simultaneously transmit CSI, SR and data, orsimultaneously transmit CSI, HARQ-ACK, SR and data, it transmitsHARQ-ACK and/or SR on the PUCCH and transmits CSI and data on the PUSCH.

When it is determined that the UE cannot transmit a PUCCH and a PUSCHsimultaneously (i.e., within a slot) according to configurationinformation from a higher-layer signaling, the UE transmits UCI and dataonly on the PUSCH, or transmits UCI and data only on the PUCCH.

The format of the PUCCH for transmitting UCI may be determined accordingto the total number of bits occupied by UCI to be transmitted.

Example 8

This example is different from example 6 only in that: a UE need not todetermine whether a PUCCH and a PUSCH can be simultaneously transmittedby receiving an additional signaling, and instead, it is prescribed by apredefined rule that the UE transmits UCI and data on the PUSCH if PUSCHresource is available in a current subframe and transmits UCI and dataon the PUCCH if PUSCH resource is not available in the current subframe.

In the present example, the format of the PUCCH for transmitting UCI maybe determined according to the total number of bits occupied by UCI tobe transmitted.

Processes described above are based on a fact that the bandwidthcapacity of a UE is equal to system bandwidth or configured by a basestation.

Another process for transmitting UCI and data by a UE will be introducedthrough following examples. In this process, the UE determines whetherthe resource for transmitting UCI is within its frequency band capacity,and then transmits UCI and data according to the result of thedetermination. Furthermore, processes based on the fact that thebandwidth capacity of the UE is equal to system bandwidth or configuredby the base station, can be performed when the UE determines that theresource for transmitting UCI is within its frequency band capacity.

Example 1

A base station configures frequency-domain resource locations of a PUCCHand a PUSCH according to a higher-layer signaling. The frequency-domainlocation comprises two parts, of which one is the location of a sub-bandand another is the location of a PRB within the sub-band. The basestation configures a plurality of sub-bands for the UE, and eachsub-band comprises some PUCCH resource and some PUSCH resource.

As shown in FIG. 17 , when the PUSCH resource for transmitting data andthe PUCCH resource for transmitting UCI are within the frequency bandcapacity of the UE, the UE transmits UCI and data on the PUSCH, ortransmits UCI on the PUCCH and data on the PUSCH, which may depend onprescription in a protocol or configuration by a higher-layer signaling.

As shown in FIG. 18 , when the PUSCH resource for transmitting data andsome of the PUCCH resource for transmitting UCI are outside thefrequency band capacity of the UE (it is to be noted that if a singlepiece of resource is not completely within the frequency band capacityof the UE, a determination of being outside the frequency band capacityof the UE may be made), the UE transmits UCI and data on the PUSCH, ortransmits UCI and stops transmitting data on the some of the PUCCHresource.

Example 2

A base station configures frequency-domain resource locations of a PUCCHand a PUSCH according to a higher-layer signaling. The frequency-domainlocation comprises two parts, of which one is the location of a sub-bandand another is the location of a PRB within the sub-band. The basestation configures a plurality of sub-bands for the UE, and eachsub-band comprises some PUCCH resource and some PUSCH resource.

As shown in FIG. 19 , when the PUSCH resource for transmitting UCI iswithin the frequency band capacity of the UE and the UE does nottransmit data, the UE uses the PUCCH to transmit UCI.

When the PUSCH resource for transmitting data and the PUCCH resource fortransmitting UCI are within the frequency band capacity of the UE andthe UE needs to simultaneously transmit data and UCI, the UE transmitsUCI and data on the PUSCH, or transmits UCI on the PUCCH and data on thePUSCH, which may depend on prescription in a protocol or configurationby a higher-layer signaling.

As shown in FIG. 20 , when the PUSCH resource for transmitting data andthe PUCCH resource for transmitting UCI are outside the frequency bandcapacity of the UE and the UE needs to simultaneously transmit data andUCI, the UE transfers UCI from the PUCCH for transmitting UCI onto aPUCCH within the frequency band capacity of the UE. In this case, the UEtransmit data on the PUSCH. For example, a sub-band n and a sub-band mare configured by a higher-layer signaling. When the sub-band m iswithin the frequency band capacity of the UE, the resource fortransmitting UCI is in the sub-band n and the PUSCH is in the sub-bandm, the UE transfers UCI onto the PUCCH in the sub-band m to transmit itand transmit data on the PUSCH in the sub-band m, or the UE transfersUCI onto the PUSCH in the sub-band m to transmit it without transmittingany data. The PUCCH in the sub-band n and the PUCCH in the sub-band mare identical in relative location, that is, they are identical inlocation relative to the sub-band where they locate.

Example 3

A base station uses physical layer signaling dynamic indication (forexample, HARQ-ACK resource) or higher-layer signaling configuration (forexample, periodic CSI resource) to indicate respective frequency-domainresource locations of a PUCCH and a PUSCH. The frequency-domain locationcomprises two parts, of which one is the location of a sub-band andanother is the location of a PRB within the sub-band. The base stationconfigures a plurality of sub-bands for the UE, and each sub-bandcomprises some PUCCH resource and some PUSCH resource.

When the PUCCH resource for transmitting UCI is within the frequencyband capacity of the UE and no data is to be transmitted by the UE, theUE uses the PUCCH to transmit UCI.

As shown in FIG. 21 , in the case that the UE needs to simultaneouslytransmitting data and UCI, when some PUSCHs for transmitting data andsome PUCCHs for transmitting UCI are outside the frequency band capacityof the UE and some PUSCHs for transmitting data and some PUCCHs fortransmitting UCI are within the frequency band capacity of the UE, theUE transmits UCI on the PUCCH within its frequency band capacity andtransmits data on the PUSCH within its frequency band capacity. As canbe seen in FIG. 21 , PUCCH1 is a PUCCH for transmitting UCI1, PUCCH2 isa PUCCH for transmitting UCI2 and PUCCH2 and PUSCH are included in thefrequency band capacity of the UE. The UE transmits UCI on PUCCH2 andtransmits data on the PUSCH. Specifically, the following situations mayexist: 1. the UE transmits UCI1 on PUCCH1 and does not transmit UCI2; 2.the UE transmits UCI1 on PUCCH1 and transmits UCI2 on the PUSCH; 3. theUE transmits both UCI1 and the UCI2 on PUCCH1 and; 4. the UE onlytransmits UCI1 and UCI2 on the PUSCH.

Example 4

A UE obtains a plurality of bandwidth parts (BPs) by receiving asignaling (for example, a higher-layer signaling). The plurality of BPsmay be divided into one or more BP groups, and there may be only one BPor a plurality of BPs in each BP group. All the BPs within each of theBP groups are within the frequency band capacity of the UE, which meansthat the UE can simultaneously transmit a channel and a signal on allthe frequency resource within any one of the BP groups, and the UE candetermine PUCCH resource configuration within each of the BP groups byreceiving a signaling (for example, a high-level signaling). The PUCCHresource configuration may be identical across all the BP groups, thatis, the PRB location of the PUCCH resource may be identical across allthe BP groups. Alternatively, the PUCCH resource configuration withinindividual BP groups may be determined independently. In this way, whenthe UE determines to transmit a channel and a signal in one BP group ata certain moment by receiving a signaling (for example, a high-levelsignaling, a physical layer signaling or a media access (MAC) layersignaling), the UE can transmit UCI by using the PUCCH resource withinthe BP group and transmit data by using the PUSCH resource within the BPgroup. The BP herein refers to frequency resource consisting of one ormore PRBs that are consecutive in frequency domain. In the presentExample, the PUCCH resource used for transmitting UCI and the PUSCHresources used for transmitting data by the UE are always within thefrequency band capacity of the UE.

It is to be noted that the UE can determine whether the PUCCH and thePUSCH can be transmitted simultaneously by receiving a higher-layersignaling when the slot lengths of the cells configured for the UE areidentical. When the UE receives a higher-layer signaling configurationthat the PUCCH and the PUSCH can be transmitted simultaneously, the UEcan transmit all or part of UCI on the PUCCH, and transmit only data ortransmit data and part of UCI on the PUSCH. When the UE receives ahigher-layer signaling configuration that the PUCCH and the PUSCH cannotbe transmitted simultaneously, the UE transmits data and UCI on thePUSCH and does not transmit PUCCH if there is a PUSCH transmission, andtransmits UCI on the PUCCH if there is no PUSCH transmission.

The following description relates to a method for transmitting UCI bythe UE in the case that a plurality of cells are configured for the UEand the slot lengths of at least two of the plurality of cells aredifferent.

In a case that the PUCCH is transmitted in a cell with a long slot (forsimplicity, referred to as a long-slot cell hereinafter) and the PUSCHis transmitted in a cell with a short slot (for simplicity, referred toas a short-slot cell hereinafter), it is not known whether there isPUSCH transmission in the short-slot cell when the UE starts the PUCCHtransmission in the long-slot cell, and it is known that there is PUSCHtransmission in the short-slot cell during an overlapped time periodwith the PUCCH transmission process, as can be seen in FIG. 22 . In thiscase, the following exemplary ways are provided for determining how theUCI is transmitted on the PUCCH and PUSCH.

Exemplary Way 1:

When a UE receives a higher-layer signaling configuration that a PUCCHand PUSCH can be transmitted simultaneously, the PUCCH is transmitted ina long slot and the PUSCH is transmitted in a short slot during a sameperiod, and then all UCI is transmitted on the PUCCH rather than on thePUSCH and only data is transmitted by the UE on the PUSCH. In this way,the UE may be prevented from transmitting a part of UCI (for example,HARQ-ACK) on the PUCCH and transmitting another part of UCI (forexample, CSI) on the PUSCH. However, in practice, there may be no PUSCHtransmission in a short-slot cell, leading to that CSI cannot betransmitted, which will affect the feedback of CSI. By using the waydescribed above in which all UCI is transmitted on the PUCCH in thelong-slot cell when the UE does not know whether there is PUSCHtransmission or not in the short-slot cell, cases in which UCI is nottransmitted may be avoided. As can be seen in FIG. 23 , the UE transmitsall the UCI only on the PUCCH in the long-slot cell 1 rather than on thePUSCH in the short-slot cell 2, and transmits data on the PUSCH in theshort-slot cell 2.

When the UE receives a higher-layer signaling configuration that thePUCCH and the PUSCH cannot be transmitted simultaneously, the PUCCH istransmitted in a long slot and the PUSCH is transmitted in a short slotduring a same period, and then all UCI is transmitted on the PUCCHrather than on the PUSCH. In this way, the UE may be prevented fromtransmitting UCI on the PUSCH rather than on the PUCCH. However, inpractice, there may be no PUSCH transmission in a short-slot cell,leading to that CSI cannot be transmitted, which will affect thefeedback of CSI. By using the way described above in which all UCI istransmitted on the PUCCH in the long-slot cell when the UE does not knowwhether there is PUSCH transmission or not in the short-slot cell, casesin which UCI is not transmitted may be avoided. In this case, if data istransmitted on the PUSCH in the short-slot cell, the configuration thatthe PUCCH and PUSCH cannot be transmitted simultaneously will beviolated. Therefore, the PUSCH will not be transmitted even if a PDCCHfor scheduling the PUSCH is received. As can be seen in FIG. 24 , the UEonly transmits all UCI on a PUCCH in a long-slot cell 1 but does nottransmit data on a PUSCH in a short-slot cell 2 in accordance with theconfiguration that the PUCCH and PUSCH cannot be transmittedsimultaneously. Alternatively, in this case, if the PDCCH for schedulingthe PUSCH is received, the PUSCH will be transmitted, as can be seen inFIG. 23 . Because if a base station does not want the UE to transmit thePUSCH, the base station may not transmit the PDCCH for scheduling thePUSCH and thus may make fuller use of the PUSCH resource to transmituplink data according to the way described hereinbefore. For example,the UE transmits all the UCI on the PUCCH in the long-slot cell 1, andtransmits data on the PUSCH in the short-slot serving cell 2.

Exemplary Way 2:

When the UE receives a higher-layer signaling configuration that thePUCCH and the PUSCH can be transmitted simultaneously, the PUCCH istransmitted in a long slot and the PUSCH is transmitted in a short slotduring a same period. If a PDCCH for scheduling the PUSCH in a shortslot is transmitted t ms ahead of a long PUCCH (that is, the UE hasknown that it will transmit the PUSCH in the short slot when starting totransmit the long PUCCH), the UE can transmit all or a part of UCI onthe PUCCH, and transmit only data or transmit data and a part of UCI onthe PUSCH, as can be seen in FIG. 25 . If a PDCCH for scheduling a PUSCHin a short slot is transmitted t ms after a long PUCCH (that is, the UEdose not know that it will transmit the PUSCH in the short slot whenstarting to transmit the long PUCCH), the UE can transmit all the UCI onthe PUCCH, and transmit only data on the PUSCH, as can be seen in FIG.26 . The value of the “t” may be configured by a high-layer signaling orpreset in a protocol, for example, t=20 ms.

When the UE receives a higher-layer signaling configuration that thePUCCH and the PUSCH cannot be transmitted simultaneously, the PUCCH istransmitted in a long slot and the PUSCH is transmitted in a short slotduring a same period. If a PDCCH for scheduling the PUSCH in a shortslot is transmitted t ms ahead of a long PUCCH (that is, the UE knowsthat it will transmit the PUSCH in the short slot when starting totransmit the long PUCCH), the UE transmits all the UCI and data on thePUSCH and does not transmit the PUCCH, as can be seen in FIG. 27 . Inthis way, the UE does not transmit the PUCCH and PUSCH simultaneously,and all UCI can be transmitted. If a PDCCH for scheduling a PUSCH in ashort slot is transmitted t ms after a long PUCCH (that is, the UE doesnot know that it will transmit the PUSCH in the short slot when startingto transmit the long PUCCH), the UE can transmit all the UCI on thePUCCH and does not transmit the PUSCH, as can be seen in FIG. 28 .Alternatively, the UE transmit the whole UCI on the PUCCH, and transmitonly data on the PUSCH, as can be seen in FIG. 26 . The value of the “t”may be configured by a high-layer signaling or preset in a protocol, forexample, t=20 ms.

Reference is now made to FIG. 29 in which a UE for transmitting UCIaccording to the present disclosure is illustrate. The UE comprises awaveform determining module configured to determine a transmissionwaveform for a PUSCH; and a data transmitting module configured totransmit UCI and data according to the determined transmission waveformfor the PUSCH.

The operation of the waveform determining module and that of the datatransmitting module correspond respectively to steps 601 and 602 of themethod for transmitting UCI according to the present disclosure, andwill not be repeated in detail herein.

It can be seen from the above detailed description of the presentdisclosure, the present disclosure has at least the followingadvantageous technical effects as compared to the prior art:

1. The UCI and data to be transmitted on a PUCCH and a PUSCH may bedeployed according to the transmission waveform for the PUSCH, thereforea higher frequency diversity gain may be obtained in the case that thereare selectable transmission waveforms for the PUCCH and the PUSCH. Inthis way, signal distortion and spectral spread interference due todifferent peak to average power ratios (PAPRs) of the waveforms may besignificantly reduced, and the overall transmission performance for UCIand system may be dramatically improved.

2. When a UE uses a CP-OFDM waveform for transmitting a PUSCH, more thanone PUCCH may be used for simultaneously transmitting UCI and data oweto the fact that PAPR will not be increased when an OFDM waveform isused for transmitting more than one channel. In this way, transmissionresource may be saved and system communication efficiency may beimproved.

3. Data is transmitted on a PUCCH according to whether the PUCCH is anexclusive one or a shared one, which may improve communication resourceutilization efficiency and satisfy high system security requirements.

4. UCI and data to be transmitted on a PUCCH and a PUSCH are deployedaccording to frequency band capacity of a UE, which not only makes fulluse of the frequency band capacity of the UE but also makes datatransmission being less affected by UCI transmission. Therefore, betterUCI transmission performance may be obtained.

It should be understood that the system, device and method disclosed inthe embodiments of the present disclosure can be implemented throughother ways. For example, the device described above is onlyillustrative. For example, units are defined only according to logicalfunction, and they may also be implemented in other way of definition inpractice. For example, more than one unit or element can be combined orintegrated into another system, or some features may be ignored or notbe implemented. In addition, coupling or direct coupling orcommunication connection illustrated or discussed may be indirectcoupling or communication connection through some interface, device orunit, and may be electrical, mechanical, or in other format.

Units that are described individually may be physically separated ornot. A component illustrated as a unit may be a physical unit or not,that is, it can be located at one place or distributed on a plurality ofnetwork units. Some or all of the units may be selected as required inorder to achieve the objects of the embodiments.

In addition, each function unit in each embodiment of the presentdisclosure can be integrated into one processing unit or individuallyexist physically. Alternatively, two or more units may be integratedinto one unit. The above integrated unit may be implemented througheither hardware or a software functional unit.

It should be understood by those of ordinary skills in the art that someor all steps in the methods of the above embodiments can be performedthrough hardware instructed by a program. The program can be stored in acomputer-readable storage medium, and the storage medium may compriseread only memory (ROM), random access memory (RAM), magnetic disk, CD orthe like.

Methods and devices provided by the present disclosure have beenintroduced in detail above. Those of ordinary skills in the art may makechanges when implementing or applying the embodiments according to thespirits of the embodiments of the present disclosure. In summary, thecontent of the description shall not be understood to limit the scope ofthe present disclosure.

Referring to FIG. 31 , the method of BWP switching of the presentinvention includes the following procedures.

In step 201, DCI is received in a time unit n, and active BWP indicationinformation in the DCI indicates a switching of an active BWP.

The active BWP indication information may indicate the active BWP is thecurrent active BWP (i.e., the active BWP does not change), or mayindicate the active BWP is a new BWP (i.e., the active BWP changes).

In step 202, a determination is made that the active BWP switches in atime unit n+k based on the received active BWP indication information(if there is a switching of the active BWP).

The k is a non-negative integer, and is a parameter to be determined inthe present invention. The value of k can be determined according to thetype of DCI indicating the active BWP switching and the type ofspectrum. For example, the value of k of a DL DCI indicating an activeBWP switching may be different to the value of k of an UL DCI indicatingan active BWP switching, i.e., they should be determined respectively.In addition, the value of k of an active BWP switching in pairedspectrum may be different to the value of k of an active BWP switchingin unpaired spectrum, i.e., they should be determined respectively. Thefollowing embodiments will describe the method of determining the valueof k in detail. In other embodiments, the value of k of a DL DCIindicating an active BWP switching may be identical to the value of k ofan UL DCI indicating an active BWP switching, and the value of k of anactive BWP switching in paired spectrum may be identical to the value ofk of an active BWP switching in unpaired spectrum, e.g., k equals 1.

The value of k may be pre-defined in a protocol (e.g., k may be definedto be 1), or configured by higher layer signaling (e.g., configured byUE-specific higher layer signaling), or specified by physical layersignaling (e.g., specified by a bit in the DCI, the value of k may bethe same with the value of k corresponding to a scheduled PDSCH orPUSCH).

For a DL active BWP, the active BWP for receiving a PDCCH and the activeBWP for receiving a PDSCH may switch in the same time slot, or indifferent time slots. For an UL active BWP, the active BWP fortransmitting a PUCCH and the active BWP for transmitting a PUSCH mayswitch in the same time slot, or in different time slots.

When a DCI indicates a switching of a BWP pair including an UL activeBWP and a DL active BWP, the UL active BWP and the DL active BWP mayswitch in the same time unit, or in different time units.

In step 203, reception of a PDCCH and/or a PDSCH on a DL active BWPstarts from the time unit n+k, and/or transmission of a PUCCH and/or aPUSCH on an UL active BWP starts from the time unit n+k.

The BWP switching method of the present invention is applicable to awireless communication system where a UE is configured with at least twoBWPs and at most one UL active BWP and at most one DL active BWP. Thetime unit of the present invention may be in unit of time slot, OFDMsymbol, or OFDM symbol set, or the like. In the following embodiments ofthe present invention, scheduling is performed in unit of time slot asan example. The method can be easily modified to be applicable tosituations where scheduling is not in unit of time slot (e.g.,scheduling may be in unit of OFDM symbol or OFDM symbol set). The activeBWP switching method of the present invention is illustrated withreference to the following embodiments.

Embodiment One

This embodiment provides a method in which a UE is informed of aswitching of a DL active BWP by received DL DCI when paired spectrum isused (i.e., UL transmission and DL transmission use different frequencybands, e.g., FDD). That is, in a time slot n, a UE receives the DCIindicating the switching of the DL active BWP, and starts to receive aPDCCH or a PDSCH on a switched DL active BWP from a time unit n+k. Thereare methods of determining the time unit in which the UE starts toreceive the PDCCH or the PDSCH on the switched DL active BWP, such asthe following methods.

Method One

If the DL DCI indicating the switching of the DL active BWP schedules aPDSCH transmitted in one time slot, and BWP switching indicationinformation in the DCI indicates there is a switching of the DL activeBWP (i.e., the DL active BWP switches from the current BWP of thecurrently transmitted DCI to another DL BWP), and the PDSCH and the DCIwhich schedules the PDSCH are in the same time slot, the UE starts toreceive the PDSCH on the switched DL active BWP from that time slot, andstarts to receive the PDCCH on the switched DL active BWP from the firstDL time slot subsequent to the time slot in which the PDSCH is received.

As shown in FIG. 32 , a UE is configured with two DL BWPs, denoted byBWP-1 and BWP-2. In time slot n, the UE detects a DCI indicating aswitching of the DL active BWP on BWP-1 (the DCI is transmitted in aPDCCH), the DCI schedules a PDSCH transmitted on BWP-2 (indicating theactive BWP switches from BWP-1 to BWP-2), and the PDSCH is transmittedalso in time slot n. The UE starts to receive the PDSCH on BWP-2 fromtime slot n, and starts to receive a PDCCH on BWP-2 from time slot n+1.This method may expediate the enforcement of a BWP switching indication.

Method Two

If the DL DCI indicating the switching of the DL active BWP schedules aPDSCH transmitted in one time slot, and BWP switching indicationinformation in the DCI indicates there is a switching of the DL activeBWP (i.e., the DL active BWP switches from the current BWP of thecurrently transmitted DCI to another DL BWP), and the PDSCH and the DCIwhich schedules the PDSCH are in different time slots, the UE starts toreceive the PDSCH on the switched DL active BWP from the time slot ofthe PDSCH, and starts to receive a PDCCH on the switched DL active BWPfrom the first DL time slot subsequent to the time slot of the PDSCH.

As shown in FIG. 33 , a UE is configured with two DL BWPs, denoted byBWP-1 and BWP-2. In time slot n, the UE detects a DCI indicating aswitching of a DL active BWP on BWP-1 (the DCI is transmitted in aPDCCH), and the DCI schedules a PDSCH transmitted on BWP-2 in time slotn+L (L is a positive integer, e.g., indicated in physical layersignaling in the DCI or configured by higher layer signaling, orpre-defined in a protocol). The UE may start to receive the PDSCH onBWP-2 from time slot n+L, start to receive a PDCCH on BWP-2 from timeslot n+L+1, and start to receive a PDCCH on BWP-1 from time slot n+1 totime slot n+L. This method can avoid resource consumption of multipleBWP switchings.

Method Three

If the DL DCI indicating the switching of the DL active BWP schedules aPDSCH in one time slot, BWP switching indication information in the DCIindicates there is a switching of the DL active BWP (i.e., the DL activeBWP switches from the current BWP of the currently transmitted DCI toanother DL BWP), and the PDSCH and the DCI which schedules the PDSCH arein different time slots, the UE starts to receive the PDSCH on theswitched DL active BWP from the time slot of the PDSCH, and starts toreceive a PDCCH on the switched DL active BWP from the time slot of thePDSCH.

As shown in FIG. 34 , a UE is configured with two DL BWPs, denoted byBWP-1 and BWP-2. In time slot n, the UE detects a DCI indicating aswitching of a DL active BWP on BWP-1 (the DCI is transmitted in aPDCCH), and the DCI schedules a PDSCH transmitted on BWP-2 in time slotn+L (L is a positive integer, e.g., indicated in physical layersignaling in the DCI or configured by higher layer signaling, orpre-defined in a protocol). The UE may start to receive the PDSCH onBWP-2 from time slot n+L, start to receive a PDCCH on BWP-2 from timeslot n+L+1, and start to receive a PDCCH on BWP-1 from time slot n+1 totime slot n+L−1.

Method Four

If the DL DCI indicating the switching of the DL active BWP schedules aPDSCH in one time slot, BWP switching indication information in the DCIindicates there is a switching of the DL active BWP (i.e., the DL activeBWP switches from the current BWP of the currently transmitted DCI toanother DL BWP), and the PDSCH and the DCI which schedules the PDSCH arein different time slots or in the same time slot, the UE starts toreceive a PDCCH on the switched DL active BWP from the m'th DL time slotsubsequent to the time slot of the DCI which indicates the switching ofthe DL active BWP (m is a non-negative integer, may be pre-defined in aprotocol, or configured by higher layer signaling, e.g., m may be 1),and starts to receive the PDSCH on the switched DL active BWP from thetime slot of the PDSCH.

As shown in FIG. 35 , a UE is configured with two DL BWPs, denoted byBWP-1 and BWP-2. In time slot n, the UE detects a DCI indicating aswitching of a DL active BWP on BWP-1 (the DCI is transmitted in aPDCCH), and the DCI schedules a PDSCH transmitted on BWP-2 in time slotn+L (L is a positive integer, e.g., indicated in physical layersignaling in the DCI or configured by higher layer signaling, orpre-defined in a protocol). The UE may start to receive the PDSCH onBWP-2 from time slot n+L, and start to receive a PDCCH on BWP-2 fromtime slot n+1 (supposing the above m is 1). This method can enablereception of a PDCCH and a PDSCH on the switched DL active BWP as earlyas possible, but may consume some resources for multiple BWP switchings.For example, when a UE is configured with two DL BWPs, denoted by BWP-1and BWP-2 and detects DCI indicating a switching of a DL active BWP onBWP-1 in time slot n (the DCI is transmitted in PDCCH), the DCIschedules a PDSCH transmitted on BWP-2 in time slot n+3, the UE mayreceive a PDSCH on BWP-2 in time slot n+3, and check BWP-2 for a PDCCHin time slots n+1 and n+2. When the UE detects in time slot n−2 that thePDSCH scheduled by the DCI is transmitted on BWP-1 in time slot n+1, anddetects in time slot n−1 that the PDSCH scheduled by the DCI istransmitted on BWP-1 in time slot n+2, the UE may receive a PDCCH onBWP-1 in time slot n. In time slot n+1, the UE first switches to BWP-2to receive a PDCCH, then switches to BWP-1 to receive a PDSCH. In timeslot n+2, the UE first switches to BWP-2 to receive a PDCCH, thenswitches to BWP-1 to receive a PDSCH. In time slot n+3, the UE firstswitches to BWP-2 to receive a PDCCH, then receives a PDSCH on BWP-2, asshown in FIG. 36 . According to the method, there are multipleswitchings between BWP-1 and BWP-2. The method can enable reception of aPDCCH and a PDSCH on the switched DL active BWP as early as possible,but may cause multiple BWP switchings which consume extra resources.

Method Five

If the DL DCI indicating a switching of a DL active BWP schedules aPDSCH in one time slot, and BWP switching indication information in theDCI indicates a switching of the DL active BWP (i.e., the DL active BWPswitches from a BWP of the currently transmitted DCI to another DL BWP),the UE may receive a PDSCH on a current active BWP, and starts toreceive a PDCCH on the switched DL active BWP from the m'th time slotsubsequent to the time slot of the DCI (m is a non-negative integer, maybe pre-defined in a protocol, or configured by higher layer signaling,e.g., m may be 1).

As shown in FIG. 37 , a UE is configured with two DL BWPs, denoted byBWP-1 and BWP-2. In time slot n, the UE detects DCI indicating aswitching of a DL active BWP on BWP-1 (the DCI is transmitted in PDCCH),the DCI schedules a PDSCH transmitted in time slot n. The UE receivesthe PDSCH on BWP-1 in time slot n, and starts to receive a PDCCH onBWP-2 from time slot n+p (p is determined by a protocol, or configuredby higher layer signaling, e.g., p may be 1). This method is alsoapplicable to situations where scheduling is not in unit of time slot.If scheduling is not carried out in unit of time slot, e.g., in unit oftwo OFDM symbols, the PDCCH and the PDSCH scheduled by the PDCCH aretransmitted in the same unit of 2 OFDM symbol, there is no sufficienttime that can serve as the time interval for BWP switching, thus the BWPfor transmitting the PDSCH should be the same BWP for transmitting thePDCCH which schedules the PDSCH, and a PDCCH in another time unit may bereceived on the switched DL active BWP.

When a PDCCH schedules a PDSCH transmitted in at least two time slots,the above five methods can be used, and the scheduled PDSCH is the firstPDSCH of the PDSCH in the at least two time slots. For example,according to the above method one, when a PDCCH schedules a PDSCHtransmitted in at least two time slots, the method may be modified tobe: if the DCI indicating a switching of a DL active BWP schedules aPDSCH transmitted in at least two time slots, and BWP switchingindication information in the DCI indicates a switching of the DL activeBWP (i.e., the DL active BWP switches from the BWP of the currentlytransmitted DCI to another DL BWP), and the PDSCH in the first time slotof the two time slots is in the same time slot with the DCI whichschedules the PDSCH, the UE starts to receive the PDSCH on the switchedDL active BWP from that time slot, and starts to receive a PDCCH on theswitched DL active BWP from the first DL time slot subsequent to thetime slot in which the PDSCH is received. As shown in FIG. 38 , a UE isconfigured with two DL BWPs, denoted by BWP-1 and BWP-2. In time slot n,the UE detects DCI indicating a switching of a DL active BWP on BWP-1(the DCI is transmitted in a PDCCH), the DCI schedules a PDSCHtransmitted on BWP-2, and the PDSCH is transmitted in time slot n andtime slot n+1. The UE starts to receive the PDSCH on BWP-2 from timeslots n and n+1, and starts to receive a PDCCH on BWP-2 from time slotn+1. Such modifications are also applicable to methods two to five.

Embodiment Two

This embodiment provides a method where a UE is informed of a switchingof an UL active BWP by received DCI when paired spectrum is used. Thatis, a UE receives DCI in time slot n which indicates a switching of anUL active BWP, and starts to transmit a PUSCH or a PUCCH on a switchedUL active BWP from a time slot n+k.

If the UL DCI indicating the switching of the UL active BWP schedules aPUSCH transmitted in one time slot, and the UL DCI indicates there is achange of the UL active BWP, the UE starts to transmit a PUSCH and aPUCCH on the switched UL active BWP from the time slot of the scheduledPUSCH. As shown in FIG. 39 , a UE is configured with two UL BWPs,denoted by BWP-1 and BWP-2. In time slot n, the UE receives UL DCI whichindicates a switching of a UL active BWP (the DCI is transmitted inPDCCH). A current UL active BWP is BWP-1 before time slot n. The DCIschedules a PUSCH transmitted on BWP-2 in time slot n+k and indicatesthe UL active BWP switches from BWP-1 to BWP-2. The UE starts totransmit the PUSCH on BWP-2 from time slot n+k, and starts to transmit aPUCCH on BWP-2 from time slot n+k. The UL active BWP switches to BWP-2in time slot n+k, and the UE starts to transmit a PUSCH and a PUCCH onthe switched UL active BWP-2 from time slot n+k.

Embodiment Three

This embodiment provides a method where a UE is informed of a switchingof a BWP pair including a DL active BWP and an UL active BWP by receivedDL DCI when unpaired spectrum is used (i.e., the same frequency band isused both for UL and DL transmission, i.e., in TDD). That is, in timeslot n, the UE receives DCI which indicates a switching of a BWP pairwhich includes a DL active BWP and an UL active BWP, starts to receive aPDCCH or a PDSCH on a switched DL active BWP from time slot n+k1, andstarts to transmit a PUCCH or a PUSCH on a switched active BWP from timeslot n+k2. The k1 may equal the k2, i.e., the DL active BWP and the ULactive BWP in the BWP pair may start to switch in the same time unit.The k1 and the k2 may be determined respectively, and may be identicalto each other, or may be different from to each other, i.e., the DLactive BWP and the UL active BWP in the BWP pair may start to switch indifferent time units. This embodiment can use the following methods todetermine the time unit in which the UE starts to receive a PDCCH or aPDSCH on the switched DL active BWP and the time unit in which the UEstarts to transmit a PUCCH or a PUSCH on the switched UL active BWP.

Method One

According to this method, a UE is informed of a switching of a BWP pairincluding a DL active BWP and an UL active BWP by received DL DCI. Thatis, in time slot n, the UE receives DCI which indicates a switching of aBWP pair including a DL active BWP and an UL active BWP, starts toreceive a PDCCH or a PDSCH on a switched DL active BWP from a time slotn+k1, and starts to transmit a PUCCH or a PUSCH on a switched UL activeBWP from a time slot n+k2. In this method, the k1 may equal the k2,i.e., the DL active BWP and the UL active BWP in the BWP pair start toswitch in the same time unit. That is, in time slot n, the UE receivesDCI which indicates a switching of a BWP pair which includes a DL activeBWP and an UL active BWP, starts to receive a PDCCH or a PDSCH on aswitched DL active BWP from time slot n+k, and starts to transmit aPUCCH or a PUSCH on a switched active BWP from time slot n+k.

The time slot in which the UE starts to receive the PDCCH or the PDSCHon the switched DL active BWP may be determined according to any of themethods one to five described in embodiment one.

The time slot in which the UE starts to transmit the PUCCH or the PUSCHon the switched UL active BWP is the first time slot for UL transmissionsubsequent to the time slot in which the UE starts to receive the PDCCHor the PDSCH on the switched DL active BWP in various methods of theabove embodiment one. The first time slot for UL transmission may be forPUCCH transmission or PUSCH transmission.

For example, in time slot n, a UE receives DCI which indicates aswitching of a BWP pair including a DL active BWP and an UL active BWP,the DCI is transmitted on DL BWP-1, and the BWP pair switchingindication information in the DCI indicates the BWP pair changes. Intime slot n, the DCI schedules a PDSCH transmitted in time slot n, thePDSCH is transmitted on a switched DL active BWP-2, time slot n does notinclude UL transmission, and time slot n+1 is an UL time slot. The UEmay start to transmit the PUCCH and/or the PUSCH on a switched UL activeBWP-2 from time slot n+1 (if the PUCCH and/or the PUSCH is required tobe transmitted in the time slot), as shown in FIG. 40 .

Method Two

According to this method, a UE is informed of a switching of a BWP pairincluding a DL active BWP and an UL active BWP by received DL DCI. Thatis, in time slot n, the UE receives DCI which indicates a switching of aBWP pair including a DL active BWP and an UL active BWP, starts toreceive a PDCCH or a PDSCH on a switched DL active BWP from a time slotn+k1, and starts to transmit a PUCCH or a PUSCH on a switched UL activeBWP from a time slot n+k2. In this method, the k1 and the k2 aredetermined respectively, and may be identical to or different from eachother. For example, k1 may be smaller than or equal to k2, i.e., the DLactive BWP and the UL active BWP in the BWP pair starts to switch indifferent time slots. That is, in time slot n, the UE receives DCI whichindicates a switching of a BWP pair which includes a DL active BWP andan UL active BWP, starts to receive a PDCCH or a PDSCH on a switched DLactive BWP from time slot n+k1, and starts to transmit a PUCCH or aPUSCH on a switched active BWP from time slot n+k2. This method canreduce collision between PUCCH resources and PUSCH resources.

The k1 of the time unit n+k1 in which the UE starts to receive the PDCCHor the PDSCH on the switched DL active BWP may be determined accordingto any of the methods one to five described in embodiment one.

The k2 of the time unit n+k2 in which the UE starts to transmit thePUCCH or the PUSCH on the switched UL active BWP may be determinedaccording to a time unit in which HARQ-ACK corresponding to the DCIindicating the BWP pair switching is transmitted or a time unit in whichHARQ-ACK corresponding to the PDSCH scheduled by the DCI is transmitted,the UL active BWP of the UE may switch in the time unit, and the UEtransmits the PUCCH and/or the PUSCH on switched UL active BWP. Forexample, the DCI indicating the BWP pair switching is transmitted intime slot n, and the HARQ-ACK of the PDSCH scheduled by the DCI istransmitted in time slot n+m, the UL active BWP of the UE may switch inthe time slot n+m, i.e., k2 equals m. In another example, the k2 may bepre-defined in a protocol, or configured by higher layer signaling, orindicated respectively in physical layer signaling, e.g., k2 is 4. Inanother example, the k2 may be determined according to a timing relationof the scheduled UL PUSCH. For example, the DL DCI indicating BWP pairswitching is transmitted in time slot n, the timing relation of thescheduled PUSCH is: if the DCI which schedules the PUSCH is transmittedin time slot n and the UE transmits the PUSCH in time slot n+p, nomatter whether there is a PUSCH scheduled in time slot n, the UL activeBWP switches in time slot n+p as long as the DL DCI indicating the BWPpair switching received by the UE in time slot n is transmitted in timeslot n, i.e., k2 equals p, and the UE starts to transmit a PUCCH and/ora PUSCH on the switched UL active BWP from time slot n+p.

For example, in time slot n, a UE receives DCI which indicates aswitching of a BWP pair including a DL active BWP and an UL active BWP,the DCI is transmitted on DL BWP-1, and the BWP pair switchingindication information in the DCI indicates there is a switching of theBWP pair. In time slot n, the DCI schedules a PDSCH transmitted in timeslot n, the PDSCH is transmitted on a switched DL active BWP-2, HARQ-ACKof the PDSCH is transmitted in time slot n+2 according to HARQ timingrelation, and time slots n+1 and n+2 are UL time slots. The UE maytransmit a PUCCH and/or a PUSCH on a current UL active BWP-1 in timeslot n+1 (if the PUCCH and/or the PUSCH is required to be transmitted inthe time slot), and start to transmit a PUCCH and/or a PUSCH on aswitched UL active BWP-2 from time slot n+2 (if the PUCCH and/or thePUSCH is required to be transmitted in the time slot), as shown in FIG.41 .

This method can try to avoid collision between PUCCH resources and PUSCHresources. For example, in time slot n, a UE receives DCI on DL activeBWP-1, the DCI schedules transmission of a PDSCH in time slot n−1 on theDL active BWP-1, HARQ-ACK of the PDSCH in time slot n−1 is transmittedin time slot n+1 on UL active BWP-1 (because in time slot n−1, the basestation does not know the switching of the UL active BWP, and allocatesPUCCH resources assuming HARQ-ACK is transmitted on UL active BWP-1; ifthe HARQ-ACK of the PDSCH transmitted in time slot n−1 is transmitted intime slot n+1 on the switched UL active BWP-2 specified by the DCItransmitted in time slot n, the HARQ-ACK may be collided with a PUSCHscheduled in the time slot n+1 (the PUSCH is scheduled in a UL DCI intime slot n−1)). The UE receives the DCI indicating the BWP pairswitching in time slot n, BWP pair switching indication information inthe DCI indicates there is a switching of the UL/DL active BWP pair, andin time slot n, and the DCI schedules a PDSCH transmitted in time slotn. The PDSCH is transmitted on a switched DL active BWP-2, and HARQ-ACKof the PDSCH is transmitted in time slot n+2 according to HARQ timingrelation. The time slot n+2 is an UL time slot. In time slot n+2 on aswitched UL active BWP-2, the UE transmits the HARQ-ACK corresponding tothe PDSCH transmitted in PUCCH time slot n, as shown in FIG. 42 . Asshown in FIG. 42 , when this method is not used, a PUCCH and a PUSCH maycollide with each other on BWP-2 in UL time slot n+1.

Embodiment Four

This embodiment describes a method where a UE is informed of a switchingof a BWP pair including a DL active BWP and an UL active BWP by receivedUL DCI when unpaired spectrum is used. That is, in time slot n, the UEreceives DCI which indicates a switching of a BWP pair which includes aDL active BWP and an UL active BWP, starts to receive a PDCCH or a PDSCHon a switched DL active BWP from time slot n+k1, and starts to transmita PUCCH or a PUSCH on a switched active BWP from time slot n+k2. The kimay equal the k2, i.e., the DL active BWP and the UL active BWP in theBWP pair start to switch in the same time unit.

The k1 and the k2 may be determined respectively, may be identical toeach other, or may be different from each other, i.e., the DL active BWPand the UL active BWP in the BWP pair start to switch in different timeunits.

This embodiment can use various methods to determine the time unit inwhich the UE starts to receive a PDCCH or a PDSCH on the switched DLactive BWP and the time unit in which the UE starts to transmit a PUCCHor a PUSCH on the switched UL active BWP.

Method One

According to this method, a UE is informed of a switching of a BWP pairincluding a DL active BWP and an UL active BWP by received UL DCI. Thatis, in time slot n, the UE receives DCI which indicates a switching of aBWP pair including a DL active BWP and an UL active BWP, starts toreceive a PDCCH or a PDSCH on a switched DL active BWP from a time slotn+k1, and starts to transmit a PUCCH or a PUSCH on a switched UL activeBWP from a time slot n+k2. In this method, the k1 may equal k2, i.e.,the DL active BWP and the UL active BWP in the BWP pair start to switchin the same time unit. That is, in time slot n, the UE receives the ULDCI which indicates a switching of a BWP pair which includes a DL activeBWP and an UL active BWP, starts to receive a PDCCH or a PDSCH on aswitched DL active BWP from time slot n+k, and starts to transmit aPUCCH or a PUSCH on a switched active BWP from time slot n+k. If the ULDCI indicating the switching of the UL/DL BWP pair schedules a PUSCH intime slot m, the value of k can be obtained according to the value of m,e.g., k may be equal to m. In another example, the value of k may bepre-defined in a protocol, configured by higher layer signaling, orindicated by physical layer signaling.

For example, a UE is informed of a switching of a DL-UL active BWP pairby received UL DCI. That is, in time slot n−1, the UE receives the ULDCI indicating the switching of the DL-UL active BWP pair. The UL DCIindicates the DL active BWP and the UL active BWP switch from BWP-1 toBWP-2. The UL DCI schedules a PUSCH transmitted in time slot n+1. The UEstarts to receive a PDCCH or a PDSCH from the switched DL active BWPfrom time slot n+1, and starts to transmit a PUCCH or a PUSCH on theswitched UL active BWP from time slot n+1, as shown in FIG. 43 .

Method Two

According to this method, a UE is informed of a switching of a BWP pairincluding a DL active BWP and an UL active BWP by received UL DCI. Thatis, in time slot n, the UE receives DCI which indicates a switching of aBWP pair including a DL active BWP and an UL active BWP, starts toreceive a PDCCH or a PDSCH on a switched DL active BWP from a time slotn+k1, and starts to transmit a PUCCH or a PUSCH on a switched UL activeBWP from a time slot n+k2. In this method, the k1 and the k2 aredetermined respectively, may be identical or different, e.g., k1 may besmaller than or equal to k2.

The k1 may be pre-defined in a protocol (e.g., k1 may be 1, i.e., the UEstarts to receive a PDCCH or a PDSCH on the switched DL active BWP fromtime slot n+1 after in time slot n receiving a DCI in which BWP pairindication information indicates a switching of the DL-UL active BWPpair), or configured by higher layer signaling. The k2 may be determinedaccording to the method one of this embodiment.

For example, a UE is informed of a switching of a DL-UL active BWP pairby received UL DCI. That is, in time slot n−1, the UE receives the ULDCI indicating the switching of the DL-UL active BWP pair. The UL DCIindicates the DL active BWP and the UL active BWP switch from BWP-1 toBWP-2. The UL DCI schedules a PUSCH transmitted in time slot n+2. The UEstarts to transmit a PUCCH or a PUSCH on the switched UL active BWP fromtime slot n+2, and starts to receive a PDCCH or a PDSCH from theswitched DL active BWP from time slot n+1, as shown in FIG. 44 .

Example Five

When time slot aggregation (i.e., multi-slot scheduling) is applied, forunpaired spectrum, the DL active BWP starts to switch from the firsttime slot of multiple time slots corresponding to a PDSCH scheduled by aslot aggregation PDCCH. For example, DL DCI in time slot n schedulesPDSCH in time slots n+1, n+2, n+3, n+4, and UL DCI in time slot n+1indicates the DL active BWP switches from DL BWP-1 to DL BWP-2 in timeslot n+2. In time slot n+2, transmission of the PDSCH scheduled by thesame PDCCH has not been finished, thus the DL active BWP switches fromDL BWP-1 to DL BWP-2 in time slot n+5.

In another example, when slot aggregation is applied, for unpairedspectrum, the switching starts in the first time slot of multiple timeslots that have the same precoding scheme. For example, DL DCI in timeslot n schedules PDSCH in time slots n+1, n+2, n+3, n+4, time slots n+1and n+2 have the same precoding scheme, and time slots n+3 and n+4 havethe same precoding scheme. UL DCI in time slot n+1 indicates the DLactive BWP switches from DL BWP-1 to DL BWP-2 in time slot n+2. In timeslot n+2, transmission of the PDSCH having the same precoding scheme intime slots n+1 and n+2 has not been finished, thus the DL active BWPswitches from DL BWP-1 to DL BWP-2 in time slot n+3.

For unpaired spectrum in slot aggregation, the UL active BWP starts toswitch from the first time slot of multiple time slots corresponding toPUSCH scheduled by a slot aggregation PDCCH. For example, UL DCI in timeslot n schedules a PUSCH transmitted in time slots n+1, n+2, n+3, n+4,and DL DCI in time slot n+1 indicates the UL active BWP switches from ULBWP-1 to UL BWP-2 in time slot n+2. In time slot n+2, transmission ofthe PUSCH scheduled by the same PDCCH has not been finished, thus the ULactive BWP switches from UL BWP-1 to UL BWP-2 in time slot n+5.

In another example, for unpaired spectrum in slot aggregation, theswitching starts in the first time slot of multiple time slots that havethe same precoding scheme. For example, UL DCI in time slot n schedulesa PUSCH transmitted in time slots n+1, n+2, n+3, n+4. Time slot n+1 usesthe same precoding scheme with time slot n+2, and time slot n+3 uses thesame precoding scheme with time slot n+4. DL DCI in time slot n+1indicates the UL active BWP switches from UL BWP-1 to UL BWP-2 in timeslot n+2. In time slot n+2, transmission of the PUSCH in time slots n+1and n+2 using the same precoding scheme has not been finished, thus theUL active BWP switches from UL BWP-1 to UL BWP-2 in time slot n+3.

Embodiment Six

When DCI in time slot n indicates an active BWP switches from BWP-1 toBWP-2 from time slot n+L, PDSCH or PUSCH is scheduled in time slot n+L,DCI in time slot n+k indicates the active BWP switches from BWP-1 toBWP-3 from time slot n+M, and a PDSCH and a PUSCH is scheduled in timeslot n+M, k<L, M<L, a processing method may include: a DL active BWPswitches from BWP-1 to BWP-3 from time slot n+M, UE starts to receive aPDSCH and/or a PDCCH on BWP-3 from time slot n+M, or transmits a PUSCHand/or a PUCCH on BWP-3 from time slot n+M, as shown in FIG. 45 .

Corresponding to the above methods, the present application alsoprovides user equipment (UE) which has a structure as shown in FIG. 46 .The UE includes a receiving module, a determining module and atransmitting module.

The receiving module receives DCI in time unit n, and active BWPindication information in the DCI indicates a switching of an activeBWP.

The determining module determines a time unit in which the switching ofthe active BWP occurs to be a time unit n+k according to the receivedactive BWP indication information. The k is a non-negative integer, andthe value of k is related with the type of the DCI.

The receiving module starts to receive a PDCCH and/or a PDSCH on a DLactive BWP from the time unit n+k, and/or the transmitting module startsto transmit a PUCCH and/or a PUSCH on an UL active BWP from the timeunit n+k.

Preferably, for paired spectrum, the receiving module may receive DL DCIin time slot n. The DL DCI indicates a switching of the DL active BWP.The receiving module starts to receive a PDCCH and/or a PDSCH on aswitched DL active BWP from time unit n+k. In this situation, thedetermining module may determine the time unit in which the DL activeBWP switches according to at least one of:

if the DL DCI schedules a PDSCH, and the active BWP indicationinformation in the DL DCI indicates a switching of the DL active BWP,and the PDSCH is within the same time unit with the DL DCI, the UEstarts to receive the PDSCH on the switched DL active BWP from the timeunit, and starts to receive a PDCCH on the switched DL active BWP fromthe first DL time unit subsequent to the time unit in which the PDSCH isreceived;

if the DL DCI schedules a PDSCH, and the active BWP indicationinformation in the DL DCI indicates a switching of the DL active BWP,and the PDSCH and the DL DCI are in different time units, the UE startsto receive the PDSCH on the switched DL active BWP from the time unit ofthe PDSCH, and starts to receive a PDCCH on the switched DL active BWPfrom the first DL time unit subsequent to the time unit of the PDSCH;

if the DL DCI schedules a PDSCH, and the active BWP indicationinformation in the DL DCI indicates a switching of the DL active BWP,and the PDSCH and the DL DCI are in different time units, the UE startsto receive the PDSCH on the switched DL active BWP from the time unit ofthe PDSCH, and starts to receive a PDCCH on the switched DL active BWPfrom the time unit of the PDSCH;

if the DL DCI schedules a PDSCH, and the active BWP indicationinformation in the DL DCI indicates a switching of the DL active BWP,and the PDSCH and the DL DCI are in different time units or in the sametime unit, the UE starts to receive a PDCCH on the switched DL activeBWP from the k'th time unit subsequent to the time unit of the DL DCI,and starts to receive the PDSCH on the switched DL active BWP from thetime unit of the PDSCH; in the above, k is a non-negative integer, andis defined in a protocol or configured by higher layer signaling;

if the DL DCI schedules a PDSCH, and the active BWP indicationinformation in the DL DCI indicates a switching of the DL active BWP,the UE receives the PDSCH on a current BWP, and starts to receive aPDCCH on the switched BWP from the k'th time unit subsequent to the timeunit of the DL DCI; in the above, k is a non-negative integer, and isdefined in a protocol or configured by higher layer signaling.

When a PDCCH schedules PDSCH transmission in at least two time units,the PDSCH scheduled by the DL DCI is: the first PDSCH of the PDSCHsscheduled in the at least two time units by the PDCCH.

Preferably, for paired spectrum, the receiving module receives UL DCIindicating a switching of an UL active BWP in time slot n, and starts totransmit a PUSCH and/or a PUCCH on the UL active BWP from time slot n+k.In this situation, the determining module determines the time slot inwhich the UL active BWP switches according to the following: if the ULDCI schedules a PUSCH and active BWP indication information in the ULDCI indicates a switching of the UL active BWP, the UE starts totransmit a PUSCH and a PUCCH on a switched BWP in the time slot of thescheduled PUSCH.

Preferably, for unpaired spectrum, the receiving module receives DL DCIwhich indicates a switching of a BWP pair including a DL active BWP andan UL active BWP in time slot n, start to receive a PDCCH and/or a PDSCHon a switched DL active BWP from time slot n+k1, and starts to transmita PUCCH and/or a PUSCH on a switched UL active BWP from time slot n+k2;k1 and k2 are identical to or different from each other.

The determining module may determine the time unit in which the DLactive BWP switches according to at least one of:

if the DL DCI schedules a PDSCH, and the active BWP indicationinformation in the DL DCI indicates a switching of the UL-DL active BWPpair, and the PDSCH is within the same time unit with the DL DCI, the UEstarts to receive a PDSCH on a switched DL active BWP from the time unitof the DL DCI, and starts to receive a PDCCH on the switched DL activeBWP from the first DL time unit subsequent to the time unit in which thePDSCH is received;

if the DL DCI schedules a PDSCH, and the active BWP indicationinformation in the DL DCI indicates a switching of the UL-DL active BWPpair, and the PDSCH and the DL DCI are in different time units, the UEstarts to receive a PDSCH on a switched DL active BWP from the time unitof the PDSCH, and starts to receive a PDCCH on the switched DL activeBWP from the first DL time unit subsequent to the time unit of thePDSCH;

if the DL DCI schedules a PDSCH, and the active BWP indicationinformation in the DL DCI indicates a switching of the UL-DL active BWPpair, and the PDSCH and the DL DCI are in different time units, the UEstarts to receive the PDSCH on a switched DL active BWP from the timeunit of the PDSCH;

if the DL DCI schedules a PDSCH, and the active BWP indicationinformation in the DL DCI indicates a switching of the UL-DL active BWPpair, and the PDSCH and the DL DCI are in different time units or in thesame time unit, the UE starts to receive a PDCCH on a switched DL activeBWP from the k'th time unit subsequent to the time unit of the DL DCI,and starts to receive PDSCH from the switched DL active BWP from thetime unit of the PDSCH; in the above, k is a non-negative integer, andis defined in a protocol or configured by higher layer signaling;

if the DL DCI schedules a PDSCH, and the active BWP indicationinformation in the DL DCI indicates a switching of the DL-UL active BWPpair, the UE receives the PDSCH on a current DL active BWP, and startsto receive a PDCCH on the switched DLactive BWP from the k'th time unitsubsequent to the time unit of the DL DCI; in the above, k is anon-negative integer, and is defined in a protocol or configured byhigher layer signaling;

when k1 equals k2, the determining module starts to transmit a PUCCHand/or a PUSCH on a switched UL active BWP from a time unit for thefirst UL transmission subsequent to the time unit in which the UE startsto receive a PDCCH or a PDSCH on the switched DL active BWP; the firstUL transmission is PUCCH transmission or PUSCH transmission.

When k1 and k2 are determined respectively, the determining moduledetermines a time unit for transmitting HARQ-ACK of the DL DCI or a timeunit for transmitting HARQ-ACK of a PDSCH scheduled by the DL DCI to bethe k2; or determining k2 as pre-defined in a protocol, configured byhigher layer signaling or specified respectively by physical layersignaling; or determining k2 according to a time relation of thescheduled UL PUSCH.

Preferably, for unpaired spectrum, the receiving module receives UL DCIwhich indicates a switching of a DL-UL BWP pair including a DL activeBWP and an UL active BWP in time slot n, starts to receive a PDCCHand/or a PDSCH on a switched DL active BWP from time slot n+k1, andstarts to transmit a PUCCH and/or a PUSCH on a switched UL active BWPfrom time slot n+k2; k1 and k2 are identical to or different from eachother.

When k1 equals k2, if the UL DCI schedules a PUSCH in time slot m, thedetermining module uses the value of m as k1 and k2, or determines k1and k2 as pre-defined in a protocol, configured by higher layersignaling, or indicated by physical layer signaling.

When k1 and k2 are determined respectively, the determining moduledetermines k1 as pre-defined in a protocol, configured by higher layersignaling; if the UL DCI schedules a PUSCH transmitted in time slot m,the determining module uses the value of m as k2, or determines k2 aspre-defined in a protocol, configured by higher layer signaling, orindicated by physical layer signaling.

Preferably, for unpaired spectrum in time slot aggregation, thedetermining module determines the time unit of the active BWP switchingaccording to at least one of:

a DL active BWP starts to switch in the first time slot of at least twotime slots of a PDSCH scheduled by a time slot aggregated PDCCH;

the DL active BWP starts to switch in the first time slot of at leasttwo time slots using the same pre-coding scheme;

the UL active BWP starts to switch in the first time slot of at leasttwo time slots of a PUSCH scheduled by a time slot aggregated PDCCH;

the UL active BWP starts to switch in the first time slot of at leasttwo time slots using the same pre-coding scheme.

When the receiving module receives a first DCI in time unit n and asecond DCI in time unit n+k, the first DCI indicates an active BWPswitches from BWP-1 to BWP-2 starting from time unit n+L, a PDSCH or aPUSCH is scheduled in time unit n+L, the second DCI indicates the activeBWP switches from BWP-1 to BWP-3 starting from time unit n+M, and aPDSCH or PUSCH is scheduled in time unit n+M, k<L, M<L, the DL activeBWP switches from BWP-1 to BWP-3 from time unit n+M, and the receivingmodule starts to receive a PDSCH and/or a PDCCH on BWP-3 from time unitn+M, or the transmitting module starts to transmit a PUSCH and/or aPUCCH on BWP-3 from time unit n+M.

Corresponding to the above method, the present application provides a UEwhich has a structure as shown in FIG. 47 . The UE includes atransceiver and a processor.

The transceiver receives DCI in time unit n, and active BWP indicationinformation in the DCI indicates a switching of an active BWP;

the processor determines the active BWP switches in a time unit n+kaccording to the received active BWP indication information;

the transceiver starts to receive a PDCCH and/or a PDSCH on a DL activeBWP from the time unit n+k, and/or starts to transmit a PUCCH and/or aPUSCH on an UL active BWP from the time unit n+k.

The scope of the claims should not be limited by the embodiments setforth in the examples, but should be given the broadest interpretationconsistent with the description as a whole.

Embodiments of the present invention will be described in detailhereafter. The examples of these embodiments have been illustrated inthe drawings throughout which same or similar reference numerals referto same or similar elements or elements having same or similarfunctions. The embodiments described hereafter with reference to thedrawings are illustrative, merely used for explaining the presentinvention and should not be regarded as any limitations thereto.

It should be understood by those skill in the art that singular forms“a”, “an”, “the”, and “said” may be intended to include plural forms aswell, unless otherwise stated. It should be further understood thatterms “include/including” used in this specification specify thepresence of the stated features, integers, steps, operations, elementsand/or components, but not exclusive of the presence or addition of oneor more other features, integers, steps, operations, elements,components, and/or combinations thereof. It should be understood thatwhen a component is referred to as being “connected to” or “coupled to”another component, it may be directly connected or coupled to otherelements or provided with intervening elements therebetween. Inaddition, “connected to” or “coupled to” as used herein may includewireless connection or coupling. As used herein, term “and/or” includesall or any of one or more associated listed items or combinationsthereof.

Unless otherwise defined, all terms (including technical and scientificterms) used herein have the same meaning as commonly understood by thoseskill in the art to which the present invention belongs. It shall befurther understood that terms, such as those defined in commonly useddictionaries, should be interpreted as having a meaning that isconsistent with their meanings in the context of the prior art and willnot be interpreted in an idealized or overly formal sense unlessexpressly so defined herein.

It should be understood by a person of ordinary skill in the art thatterm “UE” as used herein compasses not only apparatuses with a wirelesssignal receiver having no emission capability but also apparatuses withreceiving and emitting hardware capable of carrying out bidirectionalcommunication over a bidirectional communication link. Such apparatusescan include cellular or other communication apparatuses with asingle-line display or multi-line display or without a multi-linedisplay; Personal Communication Systems (PCSs) with combinedfunctionalities of speech, data processing, facsimile and/or datacommunication; Personal Digital Assistants (PDAs), which can include RFreceivers, pagers, internet/intranet accesses, web browsers, notepads,calendars and/or Global Positioning System (GPS) receivers; and/orconventional laptop and/or palmtop computers or other apparatuses havingand/or including a RF receiver. The “UE” as used herein may be portable,transportable, mountable in transportations (air, sea and/or landtransportations), or suitable and/or configured to run locally and/ordistributed in other places in the earth and/or space for running. The“UE” as used herein may be a communication UE, an internet UE, amusic/video player UE. For example, it may be a PDA, a Mobile InternetDevice (MID) and/or a mobile phone with a music/video playback function,or may be apparatuses such as a smart TV and a set-top box.

For the 5G radio communication system, the present invention provides anew method for measuring and handover cell. In this method, aftertransmitting the measurement configuration information, the base stationthen transmits UE-specific Channel State Information-Reference Signals(CSI-RS) resources used for measuring the neighboring cells (currentlyserving cell is optional), and the UE performs the measurement on thecurrent serving cell and the neighboring cells according to the newlyconfigured UE-specific CSI-RS resources (and the optional UE-specificCSI-RS resources that have been configured for the current servingcell). In addition, the UE can further measure the neighboring cellsbased on the synchronization signal blocks of the neighboring cells. TheUE finally reports the measurement result to the base station. Based onthe measurement result and the radio resource management information,the base station makes a corresponding decision, determines to hand overthe cell, and performs a subsequent handover indication process.

A method and apparatus for measuring cell, a method and apparatus forhandover provided in the present invention will be introduced one by onewith reference to specific implementation.

In the present invention, a method for measuring cell is provided whichis applied to a UE. As shown in FIG. 49 , the method includes thefollowing steps:

Step 401: a cell to which a UE belongs and neighboring cells in a celllist are measured according to at least one of an initial measurementconfiguration information and UE-specific Channel StateInformation-Reference Signal (CSI-RS) resource and a SynchronizationSignal (SS) Block to obtain a measurement result.

The measurement in this step includes the following several cases.

In a first case, the UE-specific CSI-RS resource includes a commonUE-specific CSI-RS resource, and the step of measuring the cell to whichthe UE belongs and the neighboring cells in the cell list respectivelyaccording to the initial measurement configuration information and theUE-specific CSI-RS resource to obtain the measurement result, includes:

measuring the cell to which the UE belongs and the neighboring cells inthe cell list respectively according to the initial measurementconfiguration information and the common UE-specific CSI-RS resource toobtain the measurement result.

In a second case, the UE-specific CSI-RS resource includes a specificUE-specific CSI-RS resource, and the step of measuring the cell to whichthe UE belongs and the neighboring cells in the cell list respectivelyaccording to the initial measurement configuration information and theUE-specific CSI-RS resource to obtain the measurement result, including:

measuring the cell to which the UE belongs and the neighboring cells inthe cell list respectively according to the initial measurementconfiguration information and the specific UE-specific CSI-RS resourceto obtain the measurement result.

In a third case, the UE-specific CSI-RS resource further includes acommon UE-specific CSI-RS resource and a pre-configured UE-specificCSI-RS resource, and the step of measuring the cell to which the UEbelongs according to the initial measurement configuration informationand the UE-specific CSI-RS resource to obtain the measurement result,further including:

measuring the cell to which the UE belongs according to the initialmeasurement configuration information and the pre-configured UE-specificCSI-RS resource;

measuring the neighboring cells in the cell list according to theinitial measurement configuration information and the common UE-specificCSI-RS resource to obtain the measurement result.

In the fourth case, the UE-specific CSI-RS resource includes a specificUE-specific CSI-RS resource and a pre-configured UE-specific CSI-RSresource, and the step of measuring the cell to which the UE belongsaccording to the initial measurement configuration information and theUE-specific CSI-RS resource to obtain the measurement result, furtherincluding:

measuring the cell to which the UE belongs according to the initialmeasurement configuration information and the pre-configured UE-specificCSI-RS resource to obtain the measurement result;

measuring the neighboring cells in the cell list according to theinitial measurement configuration information and the specificUE-specific CSI-RS resource to obtain the measurement result.

Based on the above, the processing of the UE further includes:

receiving the initial measurement configuration information transmittedby a base station;

performing initial measurement configuration according to the initialmeasurement configuration information, and returning an initialmeasurement configuration complete message to the base station;

receiving the UE-specific CSI-RS resource transmitted by the basestation;

or,

receiving the initial measurement configuration information and theUE-specific CSI-RS resource transmitted by the base station;

performing an initial measurement configuration according to the initialmeasurement configuration information, and returning the initialmeasurement configuration complete message to the base station.

Wherein, the configuration way of the common UE-specific CSI-RS resourceincludes any one of the following:

the common UE-specific CSI-RS resource is discrete in both the frequencydomain and time domain, and the different time resources correspond tothe same frequency resource;

the common UE-specific CSI-RS resource is discrete in both the frequencydomain and time domain, and the different time resources correspond tothe different frequency resources;

the common UE-specific CSI-RS resource is discrete in the time domainand is continuous in the frequency domain, and the different timeresources correspond to the same frequency resource;

the common UE-specific CSI-RS resource is discrete in the time domainand is continuous in the frequency domain, and the different timeresources correspond to the different frequency resources;

the common UE-specific CSI-RS resource is continuous in the time domainand is discrete in the frequency domain, and the different timeresources correspond to the same frequency resource;

the common UE-specific CSI-RS resource is continuous in the time domainand is discrete in the frequency domain, and the different timeresources correspond to the different frequency resources;

the common UE-specific CSI-RS resource is continuous in both thefrequency domain and time domain, and the different time resourcescorrespond to the same frequency resource;

the common UE-specific CSI-RS resource is continuous in both thefrequency domain and time domain, and the different time resourcescorrespond to the different frequency resources.

In a fifth case, the UE-specific CSI-RS resource includes apre-configured UE-specific CSI-RS resource, and the step of measuringthe cell to which the UE belongs and the neighboring cells in the celllist respectively according to the initial measurement configurationinformation and the UE-specific CSI-RS resource to obtain themeasurement result, including:

measuring the cell to which the UE belongs according to the initialmeasurement configuration information and a pre-configured UE-specificCSI-RS resource to obtain the measurement result; and

measuring each neighboring cell in the cell list according to theinitial measurement configuration information and the SS Block of eachneighboring cell to obtain the measurement result.

In a sixth case, the step of measuring the cell to which the UE belongsand the neighboring cells in the cell list according to the initialmeasurement configuration information and the SS Block to obtain themeasurement result, including:

measuring the cell to which the UE belongs according to the initialmeasurement configuration information and the SS Block of the cell towhich the UE belongs to obtain the measurement result;

measuring each neighboring cell in the cell list according to theinitial measurement configuration information and the SS Block of eachneighboring cell respectively to obtain the measurement result.

For the above case involving the specific UE-specific CSI-RS resource,the configuration way of the specific UE-specific CSI-RS resourceincludes any one of the following:

the specific UE-specific CSI-RS resource and the common UE-specificCSI-RS resource are discrete in both time domain and frequency domain,and are distinguished by a time division multiplexing (TDM) scheme;

the specific UE-specific CSI-RS resource and the common UE-specificCSI-RS resource are discrete in both time domain and frequency domain,and are distinguished by a frequency division multiplexing (FDM) scheme;

the specific UE-specific CSI-RS resource and the common UE-specificCSI-RS resource are discrete in both time domain and frequency domain,and are distinguished by the FDM scheme and the TDM schemesimultaneously;

the specific UE-specific CSI-RS resource and the common UE-specificCSI-RS resource are discrete in time domain and are continuous infrequency domain, and are distinguished by the TDM schemesimultaneously;

the specific UE-specific CSI-RS resource and the common UE-specificCSI-RS resource are discrete in time domain and are continuous infrequency domain, and are distinguished by the FDM scheme;

the specific UE-specific CSI-RS resource and the common UE-specificCSI-RS resource are discrete in time domain and are continuous infrequency domain, and are distinguished by the FDM scheme and the TDMscheme simultaneously;

the specific UE-specific CSI-RS resource and the common UE-specificCSI-RS resource are continuous in time domain and are discrete infrequency domain, and are distinguished by the TDM schemesimultaneously;

the specific UE-specific CSI-RS resource and the common UE-specificCSI-RS resource are continuous in time domain and are discrete infrequency domain, and are distinguished by the FDM scheme;

the specific UE-specific CSI-RS resource and the common UE-specificCSI-RS resource are continuous in time domain and are discrete infrequency domain, and are distinguished by the FDM scheme and the TDMscheme simultaneously;

the specific UE-specific CSI-RS resource and the common UE-specificCSI-RS resource are continuous both in time domain and frequency domain,and are distinguished by the TDM scheme simultaneously;

the specific UE-specific CSI-RS resource and the common UE-specificCSI-RS resource are continuous both in time domain and frequency domain,and are distinguished by the FDM scheme simultaneously;

the specific UE-specific CSI-RS resource and the common UE-specificCSI-RS resource are continuous both in time domain and frequency domain,and are distinguished by the FDM scheme and the TDM schemesimultaneously.

Further, the method further includes:

receiving any one of the following information to determine that thenumber of the UE-specific CSI-RS resource is one;

the time-domain index and frequency-domain index of the specifictime-frequency resource;

the corresponding index of the Physical Resource Block (PRB) or ResourceElement (RE) that is sorted according to the time index priority or thefrequency index priority;

predefining the timing, and configuring the PRB index or the RE orbitmap information of the frequency resource simultaneously.

The method further includes:

receiving any one of the following information to determine that thenumber of the UE-specific CSI-RS resources is at least two;

the number of time-frequency resources in the time-frequency resourcegroup for measurement, and the configuration information of eachtime-frequency resource for measurement;

pre-configured time domain index and/or frequency-domain index.

Step 402: the measurement result is transmitted to the base station.

By transmitting the measurement result to the base station, the basestation determines whether to hand over the cell to which the UEcurrently belongs according to the measurement result.

Specifically, an instruction for handover carrying the targetneighboring cell transmitted by the base station is received and thecell to which the UE belongs to is handed over to the target neighboringcell according to the instruction for handover, if it is determined bythe base station that the cell to which the UE currently belongs needsto be handed over.

Based on the foregoing method for measuring cell, the present inventionfurther discloses a method for handover, which is applied to a basestation. As shown in FIG. 50 , the method includes the following steps:

Step 501: the initial measurement configuration information andUE-specific CSI-RS resource are transmitted to the UE.

Step 502: a measurement result returned by the UE is received.

Step 503: whether to hand over a cell to which the UE belongs isdetermined according to the measurement result.

In this step, an instruction for handover carrying a target neighboringcell is transmitted, if it is determined to hand over the cell, so thatthe UE hands over from the cell to which the UE belongs to the targetneighboring cell according to the instruction for handover; otherwise,the instruction for handover is not transmitted.

Based on the foregoing method for measuring cell and method for handoverprovided by the present invention, several specific embodiments will bedescribed in detail below. The measurement resource configurationinformation in the following embodiments includes the UE-specific CSI-RSresource and/or SS Block, and the UE-specific CSI-RS resource includesthe specific UE-specific CSI-RS resource and common UE-specific CSI-RSresource.

Embodiment 1

This embodiment introduces a method for performing measurement andhandover based on UE-specific CSI-RS resource. In this embodiment, theinitial measurement configuration information and the configurationinformation of the UE-specific CSI-RS resource in the neighboring cellsare transmitted in different steps, and the cell is measured by usingthe configured UE-specific CSI-RS resource, and the neighboring cellsare measured by using the newly configured UE-specific CSI-RS resource.In this embodiment, the system can adopt a multi-beam operation, forexample, the system operates in a high frequency band and needsbeamforming gain to compensate for large path loss. The system can alsoadopt a single-beam operation, for example using an omnidirectionalantenna to provide coverage over a large angle.

The specific steps of this method are as follows:

Step 1: the base station transmits the initial measurement configurationinformation which includes the object to be measured by the UE, theneighboring cell list, the report way, the measurement identifier andthe event parameters (excluding the measurement resource configurationinformation) to the UE.

Step 2: the UE performs the measurement configuration according to themeasurement control issued by the base station, and transmits themeasurement configuration complete message to the base station.

Step 3: the base station transmits the measurement resourceconfiguration information which includes a time-frequency resourceoccupied by the UE-specific Channel State Information-Reference Signal(CSI-RS) resource for measuring neighboring cells, and the used sequenceresource to the UE.

Wherein, the base station can reserve specific UE-specific CSI-RSresource for measurement so as to distinguish from the commonUE-specific CSI-RS resource for other purposes. The specific UE-specificCSI-RS resource can be continuous or discrete, or can be a combinationof the above two. Wherein, discrete and continuous distribution can bewith respect to the frequency domain, but also with respect to the timedomain. It should be noted that the resource refers to a time-frequencyResource Element (RE) or a resource block formed by multiple REs, andcontinuous distribution refers to occupying two or more continuous REsor RE blocks in time domain or frequency domain, and the above discreteand continuous distribution is with respect to the resource distributionof CSI-RS within a certain range (for example, one slot, one subframe,one radio frame, etc.).

The specific UE-specific CSI-RS resource and the common UE-specificCSI-RS resource can be distinguished by one of a Time DivisionMultiplexing (TDM) scheme, a Frequency Division Multiplexing (FDM)scheme, and a Code Division Multiplexing (CDM) or a combination of theabove multiple schemes.

The specific configuration ways are as follows:

(1a) as shown in FIG. 52 , the specific UE-specific CSI-RS resource andthe common UE-specific CSI-RS resource are discrete in both time domainand frequency domain, and are distinguished by the TDM scheme;

(2a) as shown in FIG. 53 , the specific UE-specific CSI-RS resource andthe common UE-specific CSI-RS resource are discrete in both time domainand frequency domain, and are distinguished by the FDM scheme.

(3a) as shown in FIG. 54 , the specific UE-specific CSI-RS resource andthe common UE-specific CSI-RS resource are discrete in both time domainand frequency domain, and are distinguished by the FDM scheme and theTDM scheme simultaneously.

(4a) as shown in FIG. 55 , the specific UE-specific CSI-RS resource andthe common UE-specific CSI-RS resource are discrete in time domain andare continuous in frequency domain, and are distinguished by the TDMscheme simultaneously.

(5a) as shown in FIG. 56 , the specific UE-specific CSI-RS resource andthe common UE-specific CSI-RS resource are discrete in time domain andare continuous in frequency domain, and are distinguished by the FDMscheme.

(6a) as shown in FIG. 57 , the specific UE-specific CSI-RS resource andthe common UE-specific CSI-RS resource are discrete in time domain andare continuous in frequency domain, and are distinguished by the FDMscheme and the TDM scheme simultaneously.

(7a) as shown in FIG. 58 , the specific UE-specific CSI-RS resource andthe common UE-specific CSI-RS resource are continuous in time domain andare discrete in frequency domain, and are distinguished by the TDMscheme simultaneously.

(8a) as shown in FIG. 59 , the specific UE-specific CSI-RS resource andthe common UE-specific CSI-RS resource are continuous in time domain andare discrete in frequency domain, and are distinguished by the FDMscheme.

(9a) as shown in FIG. 60 , the specific UE-specific CSI-RS resource andthe common UE-specific CSI-RS resource are continuous in time domain andare discrete in frequency domain, and are distinguished by the FDMscheme and the TDM scheme simultaneously.

(10a) as shown in FIG. 61 , the specific UE-specific CSI-RS resource andthe common UE-specific CSI-RS resource are continuous both in timedomain and frequency domain, and are distinguished by the TDM schemesimultaneously.

(11a) as shown in FIG. 62 , the specific UE-specific CSI-RS resource andthe common UE-specific CSI-RS resource are continuous both in timedomain and frequency domain, and are distinguished by the FDM scheme.

(12a) as shown in FIG. 63 , the specific UE-specific CSI-RS resource andthe common UE-specific CSI-RS resource are continuous both in timedomain and frequency domain, and are distinguished by the FDM scheme andthe TDM scheme simultaneously.

Of course, the base station can also not reserve the specificUE-specific CSI-RS resource for the measurement but use the commonspecific CSI-RS resource as the other scenarios. The common UE-specificCSI-RS resource can be continuous or discrete, or can be a combinationof the above two. Wherein, discrete and continuous distribution can bewith respect to the frequency domain, but also with respect to the timedomain. It should be noted that continuous refers to occupying two ormore continuous REs in the time domain or the frequency domain, and thediscrete and continuous distribution is with respect to the resourcedistribution of CSI-RS within a certain range (for example, one slot,one subframe, one radio frame, etc.).

The specific configuration ways are as follows:

(1b) as shown in FIG. 64 , the common UE-specific CSI-RS resource isdiscrete in both the frequency domain and time domain, and the differenttime resources correspond to the same frequency resource.

(2b) as shown in FIG. 65 , the common UE-specific CSI-RS resource isdiscrete in both the frequency domain and time domain, and the differenttime resources correspond to the different frequency resources.

(3b) as shown in FIG. 66 , the common UE-specific CSI-RS resource isdiscrete in the time domain and is continuous in the frequency domain,and the different time resources correspond to the same frequencyresource.

(4b) as shown in FIG. 67 , the common UE-specific CSI-RS resource isdiscrete in the time domain and is continuous in the frequency domain,and the different time resources correspond to the different frequencyresources.

(5b) as shown in FIG. 68 , the common UE-specific CSI-RS resource iscontinuous in the time domain and is discrete in the frequency domain,and the different time resources correspond to the same frequencyresource.

(6b) as shown in FIG. 69 , the common UE-specific CSI-RS resource iscontinuous in the time domain and is discrete in the frequency domain,and the different time resources correspond to the different frequencyresources.

(7b) as shown in FIG. 70 , the common UE-specific CSI-RS resource iscontinuous in both the frequency domain and time domain, and thedifferent time resources correspond to the same frequency resource.

(8b) as shown in FIG. 71 , the common UE-specific CSI-RS resource iscontinuous in both the frequency domain and time domain, and thedifferent time resources correspond to the different frequencyresources.

For all of the foregoing UE-specific CSI-RS resource configurations, thebase station allocates UE-specific CSI-RS resource for measuring theneighboring cells to UE from all the UE-specific CSI-RS resourcesavailable for measurement, wherein one or more UE-specific CSI-RSresources for measurement can be allocated for each neighboring cell.When allocating a plurality of UE-specific CSI-RS resources (resourcegroups) for measurement, each of the UE-specific CSI-RS resources cancorrespond to a different beam or a different SS Block of the basestation in neighboring cells to measure the channel condition ofdifferent beam SS Blocks in the neighboring cells, which is advantageousto the selection of the optimal serving cell and beam (SS Block) afterhandover. When a plurality of UE-specific CSI-RS resources are selected,a plurality of UE-specific CSI-RS resources can be selected in a way ofconsecutively selecting a plurality of CSI-RS resources in the frequencydomain, selecting a plurality of CSI-RS resources at equal intervals inthe frequency domain, consecutively selecting a plurality of UE-specificCSI-RS resources in the time domain, or selecting a plurality of CSI-RSresources at equal intervals in time domain, or a combination of two ormore of the above ways.

It should be noted that, under the condition that the base stationconfigures and uses the above different UE-specific CSI-RS resources,the UE can further superpose different sequences or use differentsuperposition codes (Code Division Multiplexing (CDM)) in the samesequence. In this case, the base station can inform the UE the sequencecode used for the measurement by transmitting different sequenceindexes, different cyclic shift indexes of the same sequence, differentsuperposition code indexes or a combination of the above indexes.

It should also be noted that, when allocating a single UE-specificCSI-RS resource for measurement to a UE, the base station can inform theUE in the following ways:

(1a) the time domain index and the frequency domain index of thespecific time-frequency resource are respectively informed. Wherein, thetime domain index can use the subframe index of the radio frame to whichthe specific time-frequency resource belongs, or the slot index of thesubframe to which the specific time-frequency resource belongs, or thesymbol index of the slot to which the specific time-frequency resourcebelongs; another way of configuring the time-domain index can be:configuring the kth subframe after the current subframe as the startingposition for measurement, and informing the parameter k to the UE; orconfiguring the kth symbol after the current symbol as the specificchannel starting position for measurement, and informing the parameter kto the UE.

The frequency-domain index can be represented by the index of the PRB,or can be represented by using the number of PRBs or REs offsettingrelative to the center of the uplink bandwidth or the edge of thebandwidth (for example, the first PRB or RE).

(2a) the PRBs or REs of the UE-specific CSI-RS resource available formeasurement are sorted in a time index priority or frequency indexpriority way, and corresponding indexes are added. When configuring theUE-specific CSI-RS resource for measurement, the UE is informed of theindexes. The above way of sorting the PRBs or REs can be performed onall the available bandwidth or the bandwidth allocated to thecorresponding UE.

(3a) the time sequence is predefined, while the frequency resource isconfigured simultaneously. For example, it is predefined that afterreceiving the resource allocation information of the time-frequencyresource for measurement, the transmission of the UE-specific CSI-RSresource for measurement is performed on the correspondingtime-frequency resource of the kth subframe after the current subframe,or on the corresponding time-frequency resource of the kth mini-subframeafter the current mini-subframe, or on the corresponding time-frequencyresource of the kth slot after the current slot, or on the correspondingtime-frequency resource of the kth symbol after the current symbol.Wherein, the parameter k can be predefined, or can be transmitted to theUE together with the measurement configuration information.

When configuring a frequency resource, the notification can be performedby using PRB indexes or REs, or the notification can be performed by abit-map.

When the base station allocates a plurality of UE-specific CSI-RSresources (resource groups) for measurement to the UE, the UE can beinformed by the following ways:

(1b) the number of time-frequency resources in the time-frequencyresource group for measurement and each time-frequency resourceconfiguration for measurement are informed. For each configuration andnotification of time-frequency resources for measurement, several waysof configuring only a single time-frequency resource as described abovecan be adopted.

(2b) the time domain index can be configured and determined in thepredefined way, if each time-frequency resource in the time-frequencyresource group for measurement are distinguished by FDM scheme. Forexample, predefining the first subframe after kth subframe afterreceiving the configuration information, or the first slot after the kthslot, or the first symbol after the kth symbol as the time-domain indexof the access channel time-frequency resource for fast access; the abovetime-domain index which is represented by the delay (i.e, the parameterk) can be informed in a way of physical downlink control channel or in away of transmitting to the UE along with the measurement configurationinformation.

For the frequency domain index, that is, the frequency domain positionof the time-frequency resource for measurement, it can be configured andinformed by the following ways:

(i) the position of the first time-frequency resource in the frequencydomain (for example, the first PRB index of the first time-frequencyresource), the frequency-domain interval of the two adjacenttime-frequency resources (for example, using the number of the PRBs asthe unit) and the number of the time-frequency resources in thefrequency domain can be informed, if the allocated resources arearranged in the frequency domain according to certain rules, forexample, distributed at fixed interval in the frequency domain. FIG. 72is a schematic diagram of a way of configuring frequency-domain resourceof the specific channel time-frequency resource by adopting this way.

In the above example, one configured UE-specific CSI-RS resource groupfor measurement consists of three UE-specific CSI-RS resources, whichoccupy the same time resource (for example, subframes, slots orsymbols). The three specific access channels are spaced by the samenumber of PRBs (in the figure, m PRBs or REs). While informing the UE ofthe configuration of the UE-specific CSI-RS resource for measurement,the base station informs the first frequency domain position of theUE-specific CSI-RS resource for measurement, such as the first PRB or REindex, the interval m between the UE-specific CSI-RS resources formeasurement and the number of the UE-specific CSI-RS resources formeasurement. It is to be noted that, another configuration way is todetermine the frequency-domain position of the first UE-specific CSI-RSresource for measurement, or the interval of the UE-specific CSI-RSresources for measurement, or the number of the UE-specific CSI-RSresources for measurement in a predefined way or a way of transmittingto the UE along with the measurement configuration information.

(ii) the bit-map is used to determine the frequency-domain index. Thetime-frequency resources available for measurement are divided intoresource groups according to PRBs/REs or integer number of PRBs/REs, andan index is added to each resource group to define a bit group b=[b₁, .. . , b_(M)] in which the number of elements is the same as the numberof the divided resource groups, and the value of the i^(th) elementb_(i) in the bit group is 0 or 1, indicating whether the i^(th) resourcegroup is available for measurement, wherein 0 means that the i^(th)resource group is not used for measurement and 1 means that i^(th)resource group is used for measurement.

(iii) each of the frequency-domain positions of the UE-specific CSI-RSresources for the measurement is directly informed, for example, theindex of the first PRB or RE of each UE-specific CSI-RS resource formeasurement.

(3b) the frequency-domain index can be configured and determined in apredefined way, for example, predefining a frequency-domain resource formeasurement, determining the frequency-domain position of the PRB or REfor measurement in a resource group; or determining the frequency-domainposition of the PRB or RE for measurement by transmitting to the UEalong with the measurement configuration information, if time-divisionmultiplexing scheme is used to distinguish each time-frequency resourcein a time-frequency resource group for measurement.

For the frequency-domain index, that is, the frequency-domain positionof the time-frequency resource for measurement, it can be configured andinformed by the following ways:

(i) the time-domain position of each UE-specific CSI-RS resource formeasurement is determined by informing the time-domain index of thefirst UE-specific CSI-RS resource for measurement, the time-domaininterval of the adjacent UE-specific CSI-RS resources for measurementand the number of the UE-specific CSI-RS resources for measurement, ifthe allocated resources are arranged in the time domain according tocertain rules, for example, distributed at a fixed interval in the timedomain. Wherein, the time-domain interval of the adjacent UE-specificCSI-RS resources for measurement can also be represented by the densityof the UE-specific CSI-RS resources for measurement. FIG. 73 is aschematic diagram of a way of configuring time-domain resource of thespecific channel time-frequency resource by adopting this way.

(ii) each time-domain index of the UE-specific CSI-RS resource formeasurement in the UE-specific CSI-RS resource group for measurement isdirectly informed, said time-domain index can be represented by usingone of a radio frame index, a subframe index, a slot index or a symbolindex or a combination of the above indexes.

(4b) the configuration and notification of the UE-specific CSI-RSresources for measurement can be performed by using the combination ofthe ways (2b) and (3b), if the UE-specific CSI-RS resources formeasurement in the UE-specific CSI-RS resource group for measurement aredistinguished by adopting TDM and FDM simultaneously, and meanwhile,each UE-specific CSI-RS resource for measurement is configured accordingto certain rules in the time domain and the frequency domain. Forexample, the frequency-domain interval, the time-domain interval (or thetime-domain density), the time-domain and frequency-domain positions ofthe first UE-specific CSI-RS resources for measurement (the time-domainindex and frequency-domain index) and the number of the UE-specificCSI-RS resources for measurement in the time-domain and frequency-domaindirections are as shown in FIG. 74 , if the UE-specific CSI-RS resourcesfor measurement are evenly spaced in the frequency domain and the timedomain.

In addition, it should be noted that the measurement configurationinformation includes not only the initial measurement configurationinformation in step 1 but also the measurement resource configurationinformation in step 3. In addition, for different cells, the allocationway and the notification way of the UE-specific CSI-RS resources formeasurement can be the same or different. However, the UE-specificCSI-RS resources for measurement can be simultaneously configured to oneor more UEs.

Step 4: the UE measures the cell based on the initial measurementconfiguration information received in step 1 and the UE-specific CSI-RSresources configured for the cell, and optionally measures theneighboring cells based on the initial measurement configurationinformation received in step 1 and the configuration information of theUE-specific CSI-RS resources for measurement for the neighboring cellsreceived in step 3 and reports the measurement results to the basestation.

It should be noted that, for the same neighboring cell, the base stationcan configure one or more UE-specific CSI-RS resources for measurement.When configuring a plurality of UE-specific CSI-RS resources formeasurement, each UE-specific CSI-RS resource can correspond to adifferent SS Blocks or a different beam of a base station in theneighboring cells.

Step 5: the base station makes a decision of UE handover based on themeasurement result received in step 4 and radio resource managementinformation.

Step 6: the base station determines a suitable target cell or a suitabletarget cell and a corresponding beam/SS Block thereof, and instructs theUE to perform a final handover, if the handover is decided in step 5.

It should be noted that step 1 and step 3 in the above method can becombined, and the base station can transmit the measurementconfiguration information to the UE in step 1, which includesmeasurement resource configuration information, a target to be measuredby the UE, a neighboring cell list, a report scheme, measurementidentification, event parameters and the like. The UE then transmits ameasurement configuration complete message in step 2 and reports themeasurement results in step 3. The base station makes a handoverdecision in step 4. If the handover is decided, the base station and theUE complete the handover process in step 5.

It should be further noted that, for the measurement of this cell (thecell to which the UE belongs), the UE-specific CSI-RS resourceconfigured for the cell can be used, or the newly configured UE-specificCSI-RS resource for measurement can also be used.

In addition, it should be noted that in addition to configuringUE-specific CSI-RS resources, the UE can further measure the cell andthe neighboring cells according to the synchronization signal blocks ofthe cell and the neighboring cells.

The method for measuring and handover cell is not only applicable to theintra-gNB handover for cell, but also applicable to the inter-gNBhandover for cell (for example, an X2 handover and an S1 handover).

Embodiment 2

Based on Embodiment 1, this embodiment introduces an adjusted method forperforming measurement and handover based on UE-specific CSI-RSresources. In this embodiment, the initial measurement configurationinformation and configuration information of UE-specific CSI-RSresources of the cell and the neighboring cells are transmitted indifferent steps, and for the cell and its neighboring cells, newUE-specific CSI-RS resources are all allocated for the cell and itsneighboring cells for perform measurement. In addition, in thisembodiment, the system can adopt a multi-beam operation, for example,the system operates in a high frequency band and needs beamforming gainto compensate for the large path loss. The system can also adopt asingle-beam operation, for example adopting an omnidirectional antennato provide coverage over a large angle.

Step 1: the base station transmits the initial measurement configurationinformation to the UE, including the object to be measured by the UE, aneighboring cell list, a report scheme, a measurement identification andevent parameters, etc.

Step 2: the UE performs the measurement configuration according to themeasurement control issued by the base station, and transmits themeasurement configuration complete message to the base station.

Step 3: the base station transmits the measurement resourceconfiguration information to the UE, including a time-frequency resourceoccupied by the UE-specific CSI-RS resource for measuring the cell andthe neighboring cells, a used sequence resource, etc.

It should be noted that, the base station can reserve specificUE-specific CSI-RS resources for measurement which can be distinguishedfrom the common UE-specific CSI-RS resources for other purpose, and canmeasure by using the common UE-specific CSI-RS resources formeasurement. The UE-specific CSI-RS resources for measurement can becontinuous, or can be discrete or a combination of the above two in thetime domain and the frequency domain. Different UE-specific CSI-RSresources for measurement can be distinguished by one of the TDM, FDM orCDM or the combination of one or more of the TDM, FDM or CDM. For thesame cell, the base station can allocate one or more UE-specific CSI-RSresources for measurement to the UE, and then inform the UE in differentways. The above specific resource allocation and notification ways arespecifically described in Embodiment 1.

Step 4: the UE measures the cell based on the initial measurementconfiguration information received in step 1 and the UE-specific CSI-RSresource configuration information for measurement for the cell receivedin step 3, and optionally measures the neighboring cells based on theinitial measurement configuration information received in step 1 and theconfiguration information of the UE-specific CSI-RS resource formeasurement for the neighboring cells received in step 3 and reports themeasurement results to the base station.

Step 5: the base station makes a decision of UE handover based on themeasurement result received in step 4 and radio resource managementinformation.

Step 6: the base station determines a suitable target cell or a suitabletarget cell and a corresponding beam/SS Block thereof, and instructs theUE to perform a final handover, if the handover is decided in step 5.

The method for measuring and handover cell is not only applicable to theintra-gNB handover for cell, but also applicable to the inter-gNBhandover for cell (for example, the X2 handover and the S1 handover).

Embodiment 3

This embodiment introduces a method for performing measurement andhandover based on UE-specific CSI-RS resource. In this embodiment, theinitial measurement configuration information and the configurationinformation of the UE-specific CSI-RS resources for the neighboringcells are transmitted in the same steps, and the cell uses theconfigured UE-specific CSI-RS resources for measurement, and theneighboring cells are measured by using the newly configured CSI-RS formeasurement. In this embodiment, the system can adopt a multi-beamoperation, for example, the system operates in a high frequency band andneeds beamforming gain to compensate for the large path loss. The systemcan also adopt a single-beam operation, for example adopting anomnidirectional antenna to provide coverage over a large angle.

Step 1: the base station transmits the initial measurement configurationinformation and the measurement resource configuration information tothe UE, including the object to be measured by the UE, the neighboringcell list, the report scheme, the measurement identification, the eventparameter, the time-frequency resources occupied by the UE-specificCSI-RS resources for measuring the neighboring cells, the used sequenceresources, etc.

It should be noted that, the base station can reserve specificUE-specific CSI-RS resources for measurement which can be distinguishedfrom the common UE-specific CSI-RS resources for other purpose, and canmeasure by using the common UE-specific CSI-RS resource for measurement.The UE-specific CSI-RS resources for measurement can be continuous, orcan be discrete or a combination of the above two in the time domain andthe frequency domain. Different UE-specific CSI-RS resources formeasurement can be distinguished by one of the TDM, FDM or CDM or thecombination of one or more of the TDM, FDM or CDM. For the same cell,the base station can allocate one or more UE-specific CSI-RS resourcesfor measurement to the UE, and then inform the UE in different ways. Theabove specific resource allocation and notification ways arespecifically described in Embodiment 1.

Step 2: the UE performs measurement configuration according to themeasurement control issued by the base station, and transmits themeasurement configuration complete message to the base station.

Step 3: the UE measures the cell based on the initial measurementconfiguration information received in step 1 and the UE-specific CSI-RSresources configured by the cell, and measures the neighboring cellsoptionally based on the initial measurement configuration informationreceived in step 1 and the configuration information of the UE-specificCSI-RS resources for the measurement and reports the measurement resultsto the base station.

Step 4: the base station makes a decision of UE handover based on themeasurement results received in step 3 and radio resource managementinformation.

Step 5: the base station determines a suitable target cell or a suitabletarget cell and a corresponding beam/SS Block thereof, and instructs theUE to perform a final handover, if the handover is decided in step 4.

The method for measuring cell and handover cell is not only applicableto the intra-gNB handover for cell, but also applicable to the inter-gNBhandover for cell (for example, the X2 handover and the S1 handover).

Embodiment 4

This embodiment introduces a method for performing measurement andhandover based on UE-specific CSI-RS resources. In this embodiment, theinitial measurement configuration information and the configurationinformation of the UE-specific CSI-RS resources for the cell and theneighboring cells are transmitted in the same steps, and both the celland the neighboring cells are measured by using the newly configuredUE-specific CSI-RS resources. In this embodiment, the system can adopt amulti-beam operation, for example, the system operates in a highfrequency band and needs beamforming gain to compensate for the largepath loss. The system can also adopt a single-beam operation, forexample adopting an omnidirectional antenna to provide coverage over alarge angle.

Step 1: the base station transmits the initial measurement configurationinformation and the measurement resource configuration information tothe UE, including the object to be measured by the UE, the neighboringcell list, the report scheme, the measurement identification, the eventparameter, the time-frequency resources occupied by the UE-specificCSI-RS resources for measuring the cell and the neighboring cells, theused sequence resources, etc.

It should be noted that, the base station can reserve specificUE-specific CSI-RS resources for measurement which can be distinguishedfrom the common UE-specific CSI-RS resources for other purpose, and canmeasure by using the common UE-specific CSI-RS resource. The UE-specificCSI-RS resources for measurement can be continuous, or can be discreteor a combination of the above two in the time domain and the frequencydomain. Different UE-specific CSI-RS resources for measurement can bedistinguished by one of the TDM, FDM or CDM or the combination of one ormore of the TDM, FDM or CDM. For the same cell, the base station canallocate one or more UE-specific CSI-RS resources for measurement to theUE, and then inform the UE in different ways. The above specificresource allocation and notification ways are specifically described inEmbodiment 1.

Step 2: the UE performs measurement configuration according to themeasurement control issued by the base station, and transmits themeasurement configuration complete message to the base station.

Step 3: the UE measures the cell based on the initial measurementconfiguration information received in step 1 and the UE-specific CSI-RSresource configuration information for measurement in the cell, andmeasures the neighboring cells optionally based on the initialmeasurement configuration information received in step 1 and theconfiguration information of the UE-specific CSI-RS resources formeasurement for the neighboring cells and reports the measurement resultto the base station.

Step 4: the base station makes a decision of UE handover based on themeasurement result received in step 3 and radio resource managementinformation.

Step 5: the base station determines a suitable target cell or a suitabletarget cell and a corresponding beam/SS Block thereof, and instructs theUE to perform a final handover, if the handover is decided in step 4.

The method for measuring cell and handover cell is not only applicableto the intra-gNB handover for cell, but also applicable to the inter-gNBhandover for cell (for example, the X2 handover and the S1 handover).

Embodiment 5

This embodiment describes a method for measuring and handover based on aSynchronization Signal (SS) Block. In this embodiment, the system canadopt a multi-beam operation, for example, the system operates in a highfrequency band and needs beamforming gain to compensate for the largepath loss. The system can also adopt a single-beam operation, forexample, adopt an omnidirectional antenna to provide coverage over alarge angle.

Step 1: the base station transmits the measurement configurationinformation to the UE, including the object to be measured by the UE,the neighboring cell list, the report scheme, the measurementidentification, the event parameter, etc.

Step 2: the UE performs measurement configuration according to themeasurement control issued by the base station, and transmits ameasurement configuration complete message to the base station.

Step 3: the UE measures the cell based on the initial measurementconfiguration information received in step 1 and the UE-specific CSI-RSresources have been configured for cell or the SS Block of the cell, andmeasures the neighboring cells optionally based on the initialmeasurement configuration information received in step 1 and the SSBlock of the neighboring cells, and reports the measurement results tothe base station.

Step 4: the base station makes a decision of UE handover based on themeasurement results received in step 3 and radio resource managementinformation.

Step 5: the base station determines a suitable target cell or a suitabletarget cell and a corresponding beam/SS Block thereof, and instructs theUE to perform a final handover, if the handover is decided in step 4.

The method for measuring cell and handover cell is not only applicableto the intra-gNB handover for cell, but also applicable to the inter-gNBhandover for cell (for example, the X2 handover and the S1 handover).

Based on the method for measuring cell provided by the presentinvention, the present invention further provides an apparatus formeasuring cell, as shown in FIG. 75 , including:

a processing unit 2801 is configured to measure a cell to which a UEbelongs and neighboring cells in a cell list according to at least oneof initial measurement configuration information, a UE-specific ChannelState Information Reference Signal (CSI-RS) resource and aSynchronization Signal (SS) Block to obtain a measurement result;

a transmitting unit 2802 is configured to transmit the measurementresult to a base station.

Based on the above method for measuring cell provided by the presentinvention, the present invention further provides an apparatus forhandover, as shown in FIG. 76 , including:

a transmitting unit 2901 is configured to transmit initial measurementconfiguration information and a UE-specific CSI-RS resource to a UE;

a receiving unit 2902 is configured to receive a measurement resultreturned by the UE.

a processing unit 2903 is configured to determine, according to themeasurement result, whether to hand over a cell to which the UE belongscurrently; and when it is determined to hand over, transmit aninstruction for handover carrying a target neighboring cell.

The method and apparatus for measuring cell and the method and apparatusfor handover described in the present invention can be applied to afuture 5G radio network without a common cell reference signal andflexibly configure a cell to be measured and its correspondingUE-specific CSI-RS resource for measurement according to informationsuch as radio resource management information and cell load, tosignificantly improve the efficiency and performance of the measurementand handover process.

Based on the above embodiment of the present invention, as shown in FIG.77 , a radio communication system 100 according to an exemplaryembodiment of the present invention is shown, in which the UE detectsthe indication information. The radio communication system 100 includesone or more fixed infrastructure units that form a network that isdistributed over a geographic area. The base unit can also be referredto as an access point (AP), an access terminal (AT), a base station(BS), a Node-B, an evolved NodeB (eNB), a Next-generation base station(gNB), or other terms used in the art. The AP in this embodiment of thepresent invention can be replaced by any one of the above terms. Asshown in FIG. 77 , one or more base stations 101 and 102 provideservices for several mobile stations (MS) or UEs or terminal equipmentsor users 103 and 104 in a service area. For example, the serving area isa range within a cell or a sector of cell. In some systems, one or moreBSs can be communicatively coupled to a controller forming an accessnetwork which can be communicatively coupled to one or more corenetworks. The disclosed examples are not limited to any particular radiocommunication system.

In the time domain and/or frequency domain, base stations 101 and 102transmit downlink (DL) communication signals 112 and 113 to UEs 103 and104, respectively. The UEs 103 and 104 communicate with one or more baseunits 101 and 102 through uplink (UL) communication signals 111 and 114,respectively. In one embodiment, the mobile communication system 100 isan Orthogonal Frequency Division Multiplexing (OFDM)/OrthogonalFrequency Division Multiple Access (OFDMA) system, which comprises aplurality of base stations and a plurality of UEs, wherein the pluralityof base stations includes a base station 101 and a base station 102, andthe plurality of UEs includes a UE 103 and a UE 104. The base station101 communicates with the UE 103 through the UL communication signal 111and the DL communication signal 112. When a base station has a DL packetto transmit to UEs, each UE obtains a DL allocation (resource) such as aPhysical Downlink Shared Channel (PDSCH) or a narrowband PhysicalDownlink Shared Channel (NPDSCH). When a UE needs to transmit a packetto a base station in the UL, the UE obtains a grant from the basestation, wherein, the grant allocates a Physical Uplink Shared Channel(PUSCH) containing a set of UL radio resources or Narrowband PhysicalUplink Shared Channel (NPUSCH). The UE acquires DL or UL schedulinginformation from a Physical Downlink Control Channel (PDCCH), or an MTCPDDCH (MPDCCH) or an enhanced PDCCH (EPDCCH) or a narrowband PDCCH(NPDCCH) which are specific to themselves. The DL or UL schedulinginformation and other control information carried by the downlinkcontrol channel are called Downlink Control Information (DCI). FIG. 77also shows different physical channels exemplified by DL 112 and UL 111.The DL 112 includes a PDCCH or EPDCCH or NPDCCH or MPDCCH 121, a PDSCHor NPDSCH 122, a Physical Control Formation Indicator Channel (PCFICH)123, a Physical Multicast Channel (PMCH) 124, a Physical BroadcastChannel (PBCH) or a narrowband physical broadcast channel NPBCH 125, aPhysical Hybrid Automatic Repeat Request Indicator Channel (PHICH) 126and a Primary Synchronization Signal (PSS), a Secondary SynchronizationSignal (SSS), or a Narrowband PSS (NPSS)/Narrowband SSS (NSSS). Thedownlink control channel 121 transmits a downlink control signal to theuser. The DCI 120 is carried through the downlink control channel 121.The PDSCH 122 transmits data information to the UE. The PCFICH 123transmits information used for decoding PDCCH, such as dynamicallyindicating the number of symbols used by PDCCH 121. The PMCH 124 carriesbroadcast multicast information. The PBCH or NPBCH 125 carries MasterInformation Block (MIB) for early detection of UEs and cell-widecoverage. The PHICH carries HARQ information, which indicates whetherthe base station correctly receives the transmitted signal of PUSCH. TheUL 111 includes a Physical Uplink Control Channel (PUCCH) 131, a PUSCH132, and a Physical Random Access Channel (PRACH) 133 that carriesrandom access information.

In one embodiment, the radio communication network 100 uses an OFDMA ora multi-carrier architecture, including an Adaptive Modulation andCoding (AMC) on the DL and a next-generation single-carrier FDMAarchitecture or multi-carrier OFDMA architecture for UL transmission.The single-carrier architecture based on FDMA includes Interleaved FDMA(IFDMA), Localized FDMA (LFDMA), DFT-spread OFDM (DFT-SOFDM) of IFDMA orLFDMA. In addition, the single-carrier architecture based on FDMA alsoincludes various enhanced Non-Orthogonal Multiple Access (NOMA)architectures of the OFDMA system, such as Pattern Division MultipleAccess (PDMA), Sparse Code Multiple Access (SCMA), Multi-User SharedAccess (MUSA), Low Code Rate Spreading Frequency Domain Spreading (LCRSFDS), Non-Orthogonal Coded Multiple Access (NCMA), Resource SpreadingMultiple Access (RSMA), Interleave-Grid Multiple Access (IGMA), LowDensity Spreading with Signature Vector Extension (LDS-SVE), Low CodeRate and Signature based Shared Access (LSSA), Non-Orthogonal CodedAccess (NOCA), Interleave Division Multiple Access (IDMA), RepetitionDivision Multiple Access (RDMA), Group Orthogonal Coded Access (GOCA)and Welch-bound Equality based Spread MA (WSMA).

In OFDMA systems, the remote units are served by allocating DL or ULradio resources that typically contain a set of subcarriers on one ormore OFDM symbols. An OFDMA protocol including the developed LTE of the3GPP UMTS standards and IEEE 802.16 standards is illustrated. Thearchitecture can also include the use of transmission technologies suchas Multi-Carrier CDMA (MC-CDMA), Multi-Carrier Direct Sequence CDMA(MC-DS-CDMA), Orthogonal Frequency and Code Division Multiplexing(OFCDM) of one-dimensional or two-dimensional transmission, simpler timedivision and/or frequency division multiplexing/multiple accesstechnologies, or a combination of these different technologies. In analternative embodiment, the communication system can use other cellularcommunication system protocols, including but not limited to TDMA ordirect sequence CDMA.

It should be understood by those skilled in the art that the presentinvention involves apparatuses for performing one or more of operationsas described in the present invention. Those apparatuses may bespecially designed and manufactured as intended, or may include wellknown apparatuses in a general-purpose computer. Those apparatuses havecomputer programs stored therein, which are selectively activated orreconstructed. Such computer programs may be stored in device (such ascomputer) readable media or in any type of media suitable for storingelectronic instructions and respectively coupled to a bus, the computerreadable media include but are not limited to any type of disks(including floppy disks, hard disks, optical disks, CD-ROM and magnetooptical disks), ROM (Read-Only Memory), RAM (Random Access Memory),EPROM (Erasable Programmable Read-Only Memory), EEPROM (ElectricallyErasable Programmable Read-Only Memory), flash memories, magnetic cardsor optical line cards. That is, readable media include any media storingor transmitting information in a device (for example, computer) readableform.

It may be understood by those skilled in the art that computer programinstructions may be used to realize each block in structure diagramsand/or block diagrams and/or flowcharts as well as a combination ofblocks in the structure diagrams and/or block diagrams and/orflowcharts. It may be understood by those skilled in the art that thesecomputer program instructions may be provided to general purposecomputers, special purpose computers or other processors of programmabledata processing means to be implemented, so that solutions designated ina block or blocks of the structure diagrams and/or block diagrams and/orflow diagrams are performed by computers or other processors ofprogrammable data processing means.

It may be understood by those skilled in the art that the operations,methods, steps in the flows, measures and solutions already discussed inthe present invention may be alternated, changed, combined or deleted.Further, the operations, methods, other steps in the flows, measures andsolutions already discussed in the present invention may also bealternated, changed, rearranged, decomposed, combined or deleted.Further, prior arts having the operations, methods, the steps in theflows, measures and solutions already disclosed in the present inventionmay also be alternated, changed, rearranged, decomposed, combined ordeleted.

The foregoing descriptions are merely preferred embodiments of thepresent invention. It should be noted that, for a person of ordinaryskill in the art, various modifications and embellishments can be madewithout departing from the principle of the present invention. Suchmodifications and embellishments shall be regarded as falling into theprotection scope of the present invention.

To enable objectives, technical solutions and advantages of the presentdisclosure more clear, detailed descriptions of the present disclosureare further provided in the following, accompanying with attachedfigures and embodiments.

When at least one BWP is configured for a UE, meanwhile there is onlyone active BWP, the UE may simultaneously receive data and a referencesignal (RS) of one BWP.

FIG. 79 is a basic flow chart illustrating a method for reporting CSI,in accordance with an embodiment of the present disclosure. As shown inFIG. 79 , the method includes the following blocks.

In block 701, a UE selects at least one BWP from at least one configuredBWP.

In block 702, the UE calculates a CSI report, based on the BWP selectedin block 201.

Here, a method for calculating the CSI report may be firstly determined,based on the type of the BWP. And then, the CSI report is calculated,based on the determined method. The type of the BWP refers to thatwhether the BWP is an active BWP, or an inactive BWP.

In block 703, the UE transmits the calculated CSI report to a BaseStation (BS).

Descriptions about CSI measured with an inactive BWP, and CSI measuredwith an active BWP are provided in the following, by using someexamples, where periodic CSI and aperiodic CSI are respectively adopted.In addition, an event driven method may be used to report CSI and RadioResource Management (RRM), which are measured with the inactive BWP.

Detailed descriptions about the technical solutions of the presentdisclosure are further provided in the following, accompanying withseveral preferred embodiments. The present disclosure provides a methodfor reporting a CSI measurement, or reporting an RRM measurement, underthe circumstances that a UE is configured with an active BWP and aninactive BWP. The CSI measurement, or RRM measurement performed on theactive BWP or inactive BWP is independent. Since the BS needs totransmit a Physical Downlink Control Channel (PDCCH) and a PhysicalDownlink Shared Channel (PDSCH) on the active BWP, short period and highaccuracy of CSI report are needed. However, the BS does not transmit thePDCCH and PDSCH on the inactive BWP, which are only candidate resources.Thus, period of the CSI report may be longer, thereby reducing influenceon the active BWP. Descriptions for CSI measured on the inactive BWP andactive BWP are provided in the following, by using some examples, whereperiodic CSI and aperiodic CSI are adopted. In addition, an event drivenmethod may be used to report the CSI and RRM, which are measured on theinactive BWP.

A First Embodiment

The embodiment mainly describes a method for selecting a BWP for use incalculating CSI, and a method for calculating the CSI based on theselected BWP, in an aperiodic CSI report.

A First Method:

An aperiodic CSI report at a time only includes an aperiodic CSI report,which is calculated based on channels and interference situation withinone BWP. For example, a UE has configured 4 downlink BWPs, which arerespectively BWP-1, BWP-2, BWP-3 and BWP-4. The aperiodic CSI report ata time is calculated, based on channels and interference situationwithin BWP-2. On the basis of the first method, under the circumstancesthat a UE is configured with multiple downlink BWPs, there are thefollowing modes for selecting BWP, on which the aperiodic CSI report iscalculated each time.

A First Mode:

An active BWP of multiple BWPs configured by a UE is adopted tocalculate the aperiodic CSI report. The aperiodic CSI report is drivenby CSI request information of DCI, which schedules a Physical UplinkShared Channel (PUSCH). The active BWP is in a time slot, where the DCItransmitting and driving the aperiodic report is located. And, it isrequired to report the active BWP within a serving cell of the aperiodicCSI report. For example, suppose that a UE has configured 2 servingcells, which are respectively serving cell 1 and serving cell 2. Withinthe serving cell 2, the UE has configured 4 downlink BWPs, which arerespectively BWP-1, BWP-2, BWP-3 and BWP-4. In a time slot n, theaperiodic CSI report is driven by DCI, which schedules PUSCH of servingcell 1. The aperiodic CSI report needs to simultaneously include anaperiodic CSI report of serving cell 1, and an aperiodic CSI report ofserving cell 2. Meanwhile, in the time slot n, BWP-2 is the active BWPin the serving cell 2. Subsequently, the aperiodic CSI report of servingcell 2 is calculated, based on channels and interference situationwithin BWP-2, as shown in FIG. 80 . The aperiodic CSI report at leastincludes CQI. Optional, the aperiodic CSI report may further include RI,and/or, PMI. Besides, parameters in the CSI report are calculated, basedon channels and interference situation within the active BWP. The activeBWP is determined, based on channel quality and frequency-domain load.The CSI reporting the active BWP facilitates to provide an effectivesupport for resource scheduling of the BS.

A Second Mode:

The aperiodic CSI report is calculated, based on a BWP with the bestCQI. The BWP is selected by a UE from multiple BWPs, which areconfigured by the UE. The aperiodic CSI report at least includes CQI.Optional, the aperiodic CSI report may further include RI, and/or, PMI.Besides, parameters of the CSI report are calculated, based on channelsand interference situation in the BWP with the best CQI. The foregoingBWP is selected by a UE. For example, the UE has configured 4 downlinkBWPs, which are respectively BWP-1, BWP-2, BWP-3 and BWP-4. Theaperiodic CSI report is calculated, based on channels and interferencesituation of a BWP with the best CQI, and the BWP is selected by the UEfrom BWP-1, BWP-2, BWP-3 and BWP-4. Suppose that BWP-3 is the BWP withthe best CQI, which is selected by the UE, the aperiodic CSI report iscalculated, based on channels and interference situation within BWP-3.In this way, when reporting the CSI of BWP, it is necessary to reportthe number of the BWP with the best CQI. For example, the UE configures4 downlink BWPs, which are respectively BWP-1, BWP-2, BWP-3 and BWP-4.Subsequently, information of 2 bits is needed to indicate the BWP withthe best CQI, which is selected by the UE from 4 BWPs. Table 9 is anexample illustrating a specific mapping relationship, which is betweenan information indication value and BWP with the best CQI. The CSI,which reports the BWP with the best CQI, facilitates the BS to scheduleresources with the best CQI for the UE, thereby improving spectrumefficiency.

TABLE 9 a mapping relationship between information indication value andthe best BWP information BWP with the best indication value CQI 00 BWP-101 BWP-2 10 BWP-3 11 BWP-4

A Second Method

An aperiodic CSI report at a time includes aperiodic CSI reports of atleast two BWPs, which are calculated based on channels and interferencesituations within the at least two BWPs. Besides, formats of theaperiodic CSI reports of the at least two BWPs may be different. Forexample, CSI report of one BWP only includes CQI. The CSI report of theother BWP includes CQI, and/or, RI, and/or, PMI. On the basis of thesecond method, when the UE configures at least two downlink BWPs, thereare the following methods to select BWP, on which the aperiodic CSIreport is calculated each time.

A First Mode:

The aperiodic CSI report includes aperiodic CSI reports of at least twoBWPs, which are calculated based on channels and interference situationswithin the at least two BWPs. One is the aperiodic CSI report of anactive BWP. The remaining aperiodic CSI reports are about some BWPs withthe best CQI, which are selected from BWPs configured by the UE.Specific descriptions are provided in the following.

For an aperiodic CSI report, which is calculated based on an active BWPof at least two BWPs configured by the UE, the aperiodic CSI report isdriven by CSI request information of DCI scheduling PUSCH. The activeBWP is in a time slot, where DCI transmitting and driving the aperiodicCSI report is located, and the active BWP is in a serving cell, whichrequests the aperiodic CSI report. For example, suppose that the UE hasconfigured 2 serving cells, which are respectively serving cell 1 andserving cell 2. Within the serving cell 2, the UE has configured 4downlink BWPs, which are respectively BWP-1, BWP-2, BWP-3 and BWP-4.Within a time slot n, the aperiodic CSI report is driven by DCI, whichschedules PUSCH of serving cell 1. The aperiodic CSI report needs tosimultaneously report an aperiodic CSI report of serving cell 1, and anaperiodic CSI report of serving cell 2. Besides, within the time slot n,BWP-2 is the active BWP within serving cell 2. Subsequently, theaperiodic CSI report of serving cell 2 is calculated, based on channelsand interference situation within BWP-2, as shown in FIG. 80 . Theaperiodic CSI report at least includes CQI, and may further include RIand/or PMI. Besides, parameters of the CSI report are calculated, basedon channels and interference situation within the active BWP.

For the aperiodic CSI report calculated based on N (N is a positiveinteger greater than or equal to 1, the UE may obtain the value of N byreceiving a high-layer signaling configuration or protocol presets) BWPswith the best CQI, which are selected by the UE from at least twoconfigured BWPs, the aperiodic CSI report at least includes CQI, and mayfurther include RI, and/or, PMI. Besides, parameters of the CSI reportare calculated, based on channels and interference situation of N BWPswith the best CQI, and the N BWPs are selected by the UE. For example,the UE has configured 4 downlink BWPs, which are respectively BWP-1,BWP-2, BWP-3 and BWP-4. The aperiodic CSI report is calculated, based onchannels and interference situation of BWP with the best CQI, and theBWP is selected by the UE from BWP-1, BWP-2, BWP-3 and BWP-4. Forexample, BWP-3 is selected by the UE, and possesses the best CQI.Subsequently, the aperiodic CSI report is calculated, based on channelsand interference situation within BWP-3. For example, at this time, theaperiodic CSI report may only include CQI. The aperiodic CSI report aimsto select a BWP with the best CQI from multiple BWPs, and report the BWPto the BS. Subsequently, the BS activates the BWP, based on theinformation. In this way, when transmitting the CSI report, it isnecessary to simultaneously report the number of the BWP with the bestCQI.

A Second Mode:

The aperiodic CSI report includes aperiodic CSI reports of at least twoBWPs, which are calculated based on channels and interference situationswithin the at least two BWPs. The BWP, which is used for calculating theaperiodic CSI report, is determined by a method combined with high-layersignaling configuration and physical-layer signaling indication. Thephysical-layer signaling indication may be dedicated BWP indicationinformation, or the BWP for calculating the aperiodic CSI report, whichis determined by re-explaining the CSI request information. For example,the high-layer signaling has configured 4 BWPs for the UE, which arerespectively BWP-1, BWP-2, BWP-3 and BWP-4. And then, the high-layersignaling configures 2 BWP sets. BWP set 1 includes BWP-1 and BWP-2. BWPset 2 includes BWP-1, BWP-2, BWP-3 and BWP-4. The DCI, which drives theaperiodic CSI, includes BWP indication information of 1 bit. When valueof the BWP indication information is “0”, the aperiodic CSI reportincludes an aperiodic CSI report of BWP within BWP set 1. When the valueof BWP indication information is “1”, the aperiodic CSI report includesan aperiodic CSI report of BWP within BWP set 2.

Alternatively, after re-explaining the CSI request information, thefollowing items corresponding to the aperiodic CSI report are jointlydetermined, including: the serving cell, the CSI process of the servingcell, a BWP reporting the aperiodic CSI, and the BWP is in the servingcell configured with multiple BWPs. For example, when the CSI requestinformation includes 2 bits, on the basis of the mode shown in Table 10,the following items corresponding to the aperiodic CSI report aredetermined, and the items include the serving cell, the CSI process ofthe serving cell, and BWP of the serving cell.

TABLE 10 a corresponding relationship between value of CSI requestinformation and BWP of CSI report value of CSI serving cell, CSIprocess, and BWP request of the serving cell corresponding toinformation aperiodic CSI report 00 there is no aperiodic CSI report 01serving cell, CSI process, and BWP set 1 of serving cell which areconfigured by high-layer signaling, 10 serving cell, CSI process, andBWP set 2 of serving cell which are configured by high-layer signaling,11 serving cell, CSI process and BWP set 3 of serving cell which areconfigured by high-layer signaling.

A Third Mode:

The aperiodic CSI report includes aperiodic CSI reports of at least twoBWPs, which are calculated based on channels and interference situationswithin the at least two BWPs. The aperiodic CSI report is about someBWPs with the best CQI, which are selected from BWPs configured by theUE. The aperiodic CSI report is calculated based on N (N is a positiveinteger greater than or equal to 1, the UE may obtain the value of N byreceiving high-layer signaling or protocol presets) BWPs with the bestCQI, which are selected by the UE from multiple configured BWPs. Theaperiodic CSI report at least includes CQI, and may further include RI,and/or, PMI. Besides, parameters of the CSI report are calculated, basedon channels and interference situations of N BWPs with the best CQI, andthe N BWPs are selected by the UE. For example, the UE has configured 4downlink BWPs, which are respectively BWP-1, BWP-2, BWP-3 and BWP-4. Theaperiodic CSI report is calculated, based on channels and interferencesituation of a BWP with the best CQI, in which the BWP is selected bythe UE from BWP-1, BWP-2, BWP-3 and BWP-4. For example, BWP-2 and BWP-3are BWPs with the best CQI, which are selected by the UE. Subsequently,the aperiodic CSI report includes 2 aperiodic CSI reports, which arecalculated based on channels and interference situations within BWP-2and BWP-3.

A Second Embodiment

The embodiment mainly describes a method for selecting a BWP for use incalculating CSI, and a method for calculating the CSI based on theselected BWP, in a periodic CSI report,

A First Method:

The periodic CSI report only includes a periodic CSI report, which iscalculated based on channels and interference situation within an activeBWP. For example, a UE has configured 4 downlink BWPs, which arerespectively BWP-1, BWP-2, BWP-3 and BWP-4. The periodic CSI report at atime is a periodic CSI report, which is calculated based on channels andinterference situation within BWP-2. Since there is only one active BWPat the same time, the periodic CSI report is calculated, based onchannels and interference situation within the active BWP. There is oneconfiguration of period and time offset for the periodic CSI report.That is, no matter which is the active BWP, the period and time offsetof the periodic CSI report are unchanged. For example, the period andtime offset of the periodic CSI report are respectively T and t.Subsequently, the periodic CSI report is transmitted at the time momentsof t, t+T, . . . , t+NT, . . . . However, the CSI may be calculated at adifferent time moment based on a different active BWP. For example, atthe time moments of t and t+T, the CSI reported is a periodic CSIreport, which is calculated based on channels and interference situationwithin the active BWP-1. At the time moments of t+2T and t+3T, thereported CSI is a periodic CSI report, which is calculated based onchannels and interference situation within the active BWP-3, as shown inFIG. 81 . The CSI report transmitted at the time moment of t is based onthe BWP. And, the BWP is calculated by CSI-RS within the active BWP in atime slot of time moment t-k−1. The value k is configured by high-layersignaling, or is preset by protocol, which denotes processing delay ofCSI measurement. 1 is the minimum value of k, and denotes that there isCSI-RS in the active BWP of time slot of time moment t-k−1, as shown inFIG. 82 .

A Second Method:

Multiple sets of periodic CSI reports are configured to be transmitted.For example, 2 sets of periodic CSI reports are configured. One set ofperiodic CSI reports is calculated, based on channels and interferencesituation within the active BWP. The other set of periodic CSI reportsis calculated, based on channels and interference situation within theinactive BWP. Alternatively, the other set of periodic CSI reports iscalculated, based on channels and interference situation within all theBWPs. Periods and time offsets of these two sets of periodic CSI reportsare respectively configured independently. For example, period and timeoffset of the first set of periodic CSI reports are respectively T1 andt1. The period and time offset of the second set of periodic CSI reportsare respectively T2 and t2. T2 may be greater than T1, as shown in FIG.83 . Formats of CSI reports of the active BWP and inactive BWP may bedifferent. For example, the CSI report of the active BWP includes CQI.Optional, the CSI report of the active BWP may further include RI,and/or, PMI. However, the CSI report of the inactive BWP includes CQI.

As mentioned above, one set of periodic CSI reports therein onlyincludes periodic CSI reports, which are calculated based on channelsand interference situation within active BWP. For example, a UE hasconfigured 4 downlink BWPs, which are respectively BWP-1, BWP-2, BWP-3and BWP-4. The periodic CSI report at a time is a periodic CSI report,which is calculated based on channels and interference situation withinactive BWP-2. Since there is only one active BWP at the same timemoment, the periodic CSI report is calculated based on channels andinterference situation within the active BWP. There is only oneconfiguration of period and time offset for the periodic CSI report.That is, no matter which BWP is the active BWP, period and time offsetof the periodic CSI report are unchanged. For example, period and timeoffset of the periodic CSI report are respectively T and t.Subsequently, the periodic CSI report is transmitted at the time momentsof t, t+T, . . . , t+NT, . . . . However, the active BWP, depending onwhich the CSI is calculated at a different time moment, may bedifferent. For example, the CSI respectively reported at the timemoments of t and t+T is a periodic CSI report, which is calculated basedon channels and interference situation within active BWP-1. The CSIrespectively reported at the time moments of t+2T and t+3T is a periodicCSI report, which is calculated based on channels and interferencesituation within active BWP-3, as shown in FIG. 81 . The CSI reporttransmitted at the time moment of t is based on a BWP. The BWP iscalculated by CSI-RS of active BWP in a time slot of time moment t-k−1.Value k is configured by high-layer signaling, or is preset by protocol,which denotes processing delay of CSI measurement. 1 is the minimumvalue of k, and denotes that there is CSI-RS within active BWP of timeslot of time moment t-k−1, as shown in FIG. 82 . For a CSI report ofactive BWP reported by a UE, when the active BWP is changed, after theBWP is activated, the first periodic CSI report needs to report aself-contained CSI report (here, the self-contained CSI report refers tothat, the CSI is determined based on the self-contained CSI report.Since a periodic CSI report may report RI sometimes, report CQI and/orPMI sometimes, at this time, CSI is jointly determined by parametersreported at multiple time moments, this kind of CSI report is referredto as a non-self-contained CSI report. That is, at each time moment ofCSI report, only a part of CSI is included. However, the self-containedCSI report includes all the CSI components at the same time, e.g., theself-contained CSI report at least includes RI and CQI, and includes PMIoptionally). As shown in FIG. 84 , what is reported at the time momentof t is a self-contained CSI report of BWP-1. A non-self-contained CSIreport of BWP-1 is reported at the time moment of t+T. A self-containedCSI report of BWP-2 is reported at the time moment of t+2T. Anon-self-contained CSI report of BWP-2 is reported at the time moment oft+3T. Alternatively, some CSI reports in the periodic CSI report areshared by BWPs. Some CSI reports are unique to a BWP. For example, RI isshared by BWPs. That is, RI may be taken as the RI of BWP-2, in whichthe RI is obtained after measuring channels and interferences withinBWP-1, so as to obtain CQI of BWP-2. Optional, the PMI may be furtherobtained. However, CQI/PMI is unique to BWP. That is, CQI/PMI of eachBWP is obtained, based on each BWP.

As mentioned above, the other set of periodic CSI reports is calculated,based on channels and interference situation within inactive BWP. Theperiodic CSI report is calculated, based on some BWPs with the best CQI.The foregoing some BWPs are selected from BWPs configured by the UE. Theperiodic CSI report is calculated, based on N (N is a positive integergreater than or equal to 1, the UE may obtain the value of N, byreceiving a high-layer signaling configuration or protocol presets) BWPswith the best CQI. And the N BWPs are selected by the UE from multipleconfigured BWPs. The periodic CSI report at least includes CQI, and mayfurther include RI, and/or, PMI. Besides, parameters of the CSI reportare calculated, based on channels and interference situation of the NBWPs with the best CQI selected by the UE. For example, the UE hasconfigured 4 downlink BWPs, which are respectively BWP-1, BWP-2, BWP-3and BWP-4. The periodic CSI report is calculated, based on channels andinterference situation of a BWP with the best CQI, in which the BWP isselected by the UE from BWP-1, BWP-2, BWP-3 and BWP-4. Suppose thatBWP-2 and BWP-3 are the best BWPs selected by the UE, the periodic CSIreport includes 2 periodic CSI reports, which are calculated based onchannels and interference situation of BWP-2 and BWP-3.

A Third Embodiment

The CSI-RS resources, on which the aperiodic CSI report is based, aredifferent from configuration of existing aperiodic CSI-RS resources. Dueto limited bandwidth capabilities of a UE, the UE only receives CSI-RSof one BWP within a time slot, and measures the CSI-RS. Subsequently,aperiodic CSI-RS of the aperiodic CSI report may be one CSI-RS pattern,which is switched by different BWPs according to a certain format. Thatis, when receiving an aperiodic CSI-RS drive, the UE may respectivelyreceive CSI-RS of all the BWPs configured by the UE, in severaldifferent downlink time slots. For example, the UE has configured 4downlink BWPs, which are respectively BWP-1, BWP-2, BWP-3 and BWP-4. TheUE receives signaling (physical-layer signaling (DCI) or Media AccessControl (MAC) layer signaling) driving the aperiodic CSI-RS in time slotn. In subsequent several determined downlink time slots, the UErespectively receives CSI-RS in different BWPs, according to timedivision. For example, in a downlink time slot n+k (k is a non-negativeinteger, e.g., k may be equal to 0, the value of k is configured byhigh-layer signaling, or is preset by protocol), the UE receives CSI-RSon BWP-1. In a downlink time slot n+k+1, the UE receives CSI-RS onBWP-2. In a downlink time slot n+k+2, the UE receives CSI-RS on BWP-3.In a downlink time slot n+k+3, the UE receives CSI-RS on BWP-4, as shownin FIG. 85 .

The CSI-RS resources, on which the aperiodic CSI report is based, may bedifferent from configuration of existing aperiodic CSI-RS resources. Dueto limited bandwidth capabilities of a UE, the UE only receives andmeasures CSI-RS of one BWP in a time slot. Subsequently, aperiodicCSI-RS for use in aperiodic CSI report may be one CSI-RS pattern, whichis switched by different BWPs according to a certain format. That is,when receiving an aperiodic CSI-RS drive, within several differentdownlink time slots, the UE may respectively receive CSI-RS of somedesignated BWPs configured by the UE. For example, the UE has configured4 downlink BWPs, which are respectively BWP-1, BWP-2, BWP-3 and BWP-4.The UE receives signaling (physical layer signaling (DCI) or MAC layersignaling) driving the aperiodic CSI-RS in time slot n, it is indicatedthat the UE receives CSI-RS of BWP-1 and BWP-3. Subsequently, in adownlink time slot n+k, the UE receives CSI-RS on BWP-1. In a downlinktime slot n+k+1, the UE receives CSI-RS on BWP-3, as shown in FIG. 86 .

The CSI-RS resources, on which the aperiodic CSI report is based, may beperiodic CSI-RS resources. Due to limited bandwidth capabilities of aUE, the UE only receives and measures CSI-RS of one BWP in a time slot.Subsequently, when the aperiodic CSI report of the UE at a time needs tobe determined, based on channels and interference situations of multipleBWPs, the periodic CSI-RS resources of the UE should be within multipletime slots. Thus, the UE may respectively measure CSI of a different BWPat a different time moment. When the aperiodic CSI is reported in timeslot n, CSI-RS resources of BWP-i are within time slot n−k-mi. K isdetermined, based on requirements of processing delay. A processingduration between CSI-RS measurement and CSI report is left. mi isgreater than or equal to 0. In the time slot n−k-mi, there are CSI-RSresources for BWP-i. Besides, in the time slot n−k-mi, there is noCSI-RS resource for the remaining BWPs. For example, the UE hasconfigured 4 downlink BWPs, which are respectively BWP-1, BWP-2, BWP-3and BWP-4. An aperiodic CSI is reported at time slot n. The CSI-RSresources of BWP-1 are in time slot n−k-m1. The CSI-RS resources ofBWP-2 are in time slot n−k-m2. The CSI-RS resources of BWP-3 are in timeslot n−k-m3. The CSI-RS resources of BWP-4 are in time slot n−k-m4.Besides, n−k-m1, n−k-m2, n−k-m3, n−k-m4 are not overlapped, as shown inFIG. 87 . Alternatively, there is CSI-RS on multiple BWPs in the sametime slot. However, the UE cannot simultaneously receive CSI-RS ofmultiple BWPs within one time slot. Thus, when there is CSI-RS formultiple BWPs in one time slot, a priority sequence is determined toreceive CSI-RS within different BWPs. For example, CSI-RS of a BWP mostadjacent to an aperiodic CSI report is firstly received, according to adescending order of BWP number. For example, the UE has configured 4downlink BWPs, which are respectively BWP-1, BWP-2, BWP-3 and BWP-4. Theaperiodic CSI is reported at time slot n. In any time slot of time slotsn−k-m1, n−k-m2, n−k-m3, n−k-m4, there is CSI-RS on BWP-1, BWP-2, BWP-3and BWP-4. Besides, m1<m2<m3<m4. Subsequently, CSI-RS of BWP-4 isreceived in time slot n−k-m1. CSI-RS of BWP-3 is received in time slotn−k-m2. CSI-RS of BWP-2 is received in time slot n−k-m3. CSI-RS of BWP-1is received in time slot n−k-m4, which is shown in FIG. 88 .

A Fourth Embodiment

Determination of CSI-RS resources, on which the periodic CSI report isbased, is different from determination of existing periodic CSI-RSresources. Due to limited bandwidth capabilities of a UE, the UE onlyreceives and measures CSI-RS within one BWP in one time slot. Theembodiment provides the following several configuration methods fordetermining the CSI-RS resources, on which the periodic CSI report isbased.

A First Method:

A set of periodic CSI-RS is configured. Besides, the CSI-RS is onlytransmitted on an active BWP. For example, period and time offset of theperiodic CSI-RS are respectively configured to be T and t. Subsequently,the CSI-RS is transmitted at time moments of t, t+T, . . . , t+NT, . . .. The CSI-RS is transmitted on an active BWP at the time moment of t+nT.Since there is only one active BWP at the same time moment, the CSI-RSis transmitted on one BWP at the same time moment, as shown in FIG. 89 .

A Second Method:

At least two sets of periodic CSI-RS are configured. One set of periodicCSI-RS therein is only transmitted on an active BWP. The remainingCSI-RS is transmitted on the active BWP, or inactive BWP. For example,regarding one set of CSI-RS, period and time offset of periodic CSI-RSare respectively configured to be T and t. Subsequently, the CSI-RS istransmitted at the time moments of t, t+T, . . . , t+NT, . . . . At thetime moment of t+nT, the CSI-RS is transmitted on the active BWP, asshown in FIG. 89 . The period may be relatively smaller, which is foruse in accurate measurements of channel information, so as to transmitdata by using an appropriate transmission format, thereby improvingtransmission data throughput. The other set of CSI-RS is mainly adaptedto determine which BWP(s) among the multiple BWPs configured by the UEpossesses the best CQI. Subsequently, on the basis of such situation,the BS activates an appropriate BWP. This set of CSI-RS may betransmitted on multiple BWPs within a time window, according totime-division multiplexing. The period and time offset are configuredfor a CSI-RS window. For example, period and time offset of the CSI-RSwindow are respectively configured to be T1 and t2. The duration lengthof the CSI-RS time window is L. Within time windows from t2 to t2+L . .. from t2+NT1 to t2+L+NT1, the UE transmits the CSI-RS on multipledetermined BWPs. For example, CSI-RS needs to be transmitted on 3 BWPsof one time window. At the time moment of t2, CSI-RS is transmitted onBWP-1. At the time moment of t2+L/2, CSI-RS is transmitted on BWP-2. Atthe time moment of t2+L, CSI-RS is transmitted on BWP-3, as shown inFIG. 90 .

A Fifth Embodiment

When a UE is only capable of receiving a downlink channel and signal onone BWP simultaneously, if the UE performs a measurement on an inactiveBWP, the UE neither detect Control Resource Set (CORESET, PDCCH may betransmitted in a resource defined by CORESET) nor receive PDSCH on theactive BWP. A period measured by the UE on the inactive BWP is referredto as a gap. A method for determining a gap for measuring an inactiveBWP by a UE, and how to operate by the UE within the gap duration aredescribed in the following.

A First Method:

A BS configures a set of gaps (or, this gap is a time slot or anOrthogonal Frequency Division Multiplexing (OFDM) symbol occupied byCSI-RS, which is configured by the BS for the UE on an inactive BWP) forthe UE, by using unique high-layer signaling of the UE. For example, theconfigured gap is periodic. The period, time offset and time length ofgap are configured by high-layer signaling. For example, as shown inFIG. 91 , the period, time offset and time length of the periodic gapare respectively configured to be T, t and L. Subsequently, the gapstarts from time moments of t, t+T, . . . , t+NT, and duration thereofis L. Besides, unit of T, t and L is configured by unique high-layersignaling of the UE, or are preset by protocol. For example, the UEreceives a configuration of unique high-layer signaling of the UE. Theunit of T, t and L is a time slot of 1 ms. Within a time slot, where anactive BWP and gap are overlapped, or when the time interval between theactive BWP and gap is less than t′ (t′ is a delay resulted from BWPswitch), the UE does not detect CORESET or receive PDSCH on the activeBWP, which is shown in FIG. 92 .

A Second Method:

A BS configures a set of gaps (or, this gap is a time slot or an OFDMsymbol occupied by CSI-RS, and the CSI-RS is configured by the BS for aUE on an inactive BWP) for the UE, by using unique high-layer signalingof the UE. For example, the configured gap is periodic. Period, timeoffset and time length of the gap are configured by high-layersignaling. For example, as shown in FIG. 91 , period, time offset andtime length of the periodic gap are respectively configured to be T, tand L. Subsequently, the gap starts from the time moments of t, t+T, . .. , t+NT, and duration of the gap is L. Besides, unit of T, t and L isconfigured by unique high-layer signaling of the UE, or is preset byprotocol. For example, the UE receives a configuration of the uniquehigh-layer signaling of the UE. Unit of T, t and L is a time slot of 1ms. When CORESET of an active BWP is overlapped with gap (or timeinterval therebetween is less than t′ (t′ is a delay resulted from BWPswitch)), the UE does not detect CORESET in the CORESET, where theactive BWP and gap are overlapped (or time interval therebetween is lessthan t′ (t′ is a delay resulted from BWP switch)), as shown in FIG. 93 ;otherwise, the UE detects CORESET in the CORESET, where the active BWPand gap are not overlapped (or, time interval therebetween is greaterthan t′ (t′ is a delay resulted from BWP switch)), as shown in FIG. 94 .Thus, compared with the first method, reception of an active BWP is lessaffected by gap.

A Third Method:

A BS configures a set of gaps (or, this gap is a time slot or an OFDMsymbol occupied by CSI-RS, and the CSI-RS is configured by the BS for aUE on an inactive BWP) for the UE, by using unique high-layer signalingof the UE. For example, the configured gap is periodic. Period, timeoffset, and time length of the gap are configured by high-layersignaling. For example, as shown in FIG. 91 , period, time offset andtime length of the periodic gap are respectively configured to be T, tand L. Subsequently, the gap starts from the time moments of t, t+T, . .. , t+NT, and duration thereof is L. Besides, unit of T, t and L isconfigured by unique high-layer signaling of the UE, or is preset byprotocol. For example, the UE receives a configuration of uniquehigh-layer signaling of the UE. Unit of T, t and L is a time slot of 1ms. When a PDSCH scheduled by an active BWP is overlapped with gap (or,a time interval therebetween is less than t′ (t′ is a delay resultedfrom BWP switch)), the UE does not receive PDSCH overlapped with gap(or, time interval therebetween is less than t′ (t′ is a delay resultedfrom BWP switch)) on the active BWP; otherwise, the UE receives PDSCHnot overlapped with gap (or, time interval therebetween is greater than,or equal to t′ (t′ is a delay resulted from BWP switch)) on the activeBWP.

A Fourth Method:

A BS configures a set of gaps (or, this gap is a time slot or an OFDMsymbol occupied by CSI-RS, and the CSI-RS is configured by the BS for aUE on an inactive BWP) for the UE, by using unique high-layer signalingof the UE. For example, the configured gap is periodic. Period, timeoffset and time length of the gap are configured by high-layersignaling. For example, as shown in FIG. 91 , period, time offset andtime length of the periodic gap are respectively configured to be T, tand L. Subsequently, the gap starts from the time moments of t, t+T, . .. , t+NT, . . . , and duration thereof is L. Besides, unit of T, t and Lis configured by unique high-layer signaling of the UE, or is preset byprotocol. For example, the UE receives a configuration of uniquehigh-layer signaling of the UE. Unit of T, t and L is a time slot of 1ms. When a PDSCH scheduled by the active BWP is overlapped with gap (or,time interval therebetween is less than t′ (t′ is a delay resulted fromBWP switch)), the UE receives the PDSCH (or, time interval therebetweenis less than t′ (t′ is a delay resulted from BWP switch)) overlappedwith gap on the active BWP, instead of performing a measurement on theinactive BWP. When the BS wants the UE to measure the inactive BWPwithin the gap, the BS may not schedule foregoing PDSCH. When the BSdoes not want the UE to measure the inactive BWP within the gap, the BSmay schedule foregoing PDSCH, such that the BS possesses greaterflexibility. When there is no PDSCH scheduled by the active BWP isoverlapped with gap (or time interval therebetween is less than t′ (t′is a delay resulted from BWP switch)), the UE measures the inactive BWPwithin the gap.

Corresponding to foregoing method, the present disclosure also providesa device for reporting CSI. The basic structure of the device is shownin FIG. 95 , including a BWP selecting module, a CSI calculating moduleand a CSI reporting module.

The BWP selecting module is configured to select at least one BWP fromat least one BWP, which is configured by the device.

The CSI calculating module is configured to calculate a CSI report,based on the selected BWP.

The CSI reporting module is configured to transmit the CSI report to aBS.

The foregoing is only preferred embodiments of the present disclosure,which is not for use in limiting the present disclosure. Anymodifications, equivalent substitutions and improvements made within thespirit and principle of the present disclosure, should be covered by thepresent disclosure.

1. A method performed by a terminal in a communication system, themethod comprising: receiving, from a base station, downlink controlinformation (DCI) including an indicator indicating bandwidth part (BWP)switching; performing the BWP switching in a slot of a physical downlinkshared channel (PDSCH) scheduled by the DCI; and receiving, from thebase station, data in the PDSCH on a switched BWP.
 2. The method ofclaim 1, wherein data reception is started on the switched BWP from theslot of the PDSCH.
 3. The method of claim 1, wherein the slot of thePDSCH is identified based on a slot offset indicated by the DCI.
 4. Themethod of claim 1, further comprising: receiving, from the base station,information on BWPs, wherein the indicator indicates one of the BWPs forBWP switching.
 5. The method of claim 1, wherein the switched BWP is anactivated BWP.
 6. A method performed by a base station in acommunication system, the method comprising: transmitting, to aterminal, downlink control information (DCI) including an indicatorindicating bandwidth part (BWP) switching; performing the BWP switchingin a slot of a physical downlink shared channel (PDSCH) scheduled by theDCI; and transmitting, to the base station, data in the PDSCH on aswitched BWP.
 7. The method of claim 6, wherein data transmission isstarted on the switched BWP from the slot of the PDSCH.
 8. The method ofclaim 6, wherein the slot of the PDSCH is identified based on a slotoffset indicated by the DCI.
 9. The method of claim 6, furthercomprising: transmitting, to the terminal, information on BWPs, whereinthe indicator indicates one of the BWPs for BWP switching.
 10. Themethod of claim 6, wherein the switched BWP is an activated BWP.
 11. Aterminal in a communication system, the terminal comprising: atransceiver; and a controller coupled with the transceiver andconfigured to: receive, from a base station, downlink controlinformation (DCI) including an indicator indicating bandwidth part (BWP)switching, perform the BWP switching in a slot of a physical downlinkshared channel (PDSCH) scheduled by the DCI, and receive, from the basestation, data in the PDSCH on a switched BWP.
 12. The terminal of claim11, wherein data reception is started on the switched BWP from the slotof the PDSCH.
 13. The terminal of claim 11, wherein the slot of thePDSCH is identified based on a slot offset indicated by the DCI.
 14. Theterminal of claim 11, wherein the controller is configured to receive,from the base station, information on BWPs, and wherein the indicatorindicates one of the BWPs for BWP switching.
 15. The terminal of claim11, wherein the switched BWP is an activated BWP.
 16. A base station ina communication system, the base station comprising: a transceiver; anda controller coupled with the transceiver and configured to: transmit,to a terminal, downlink control information (DCI) including an indicatorindicating bandwidth part (BWP) switching, perform the BWP switching ina slot of a physical downlink shared channel (PDSCH) scheduled by theDCI, and transmit, to the base station, data in the PDSCH on a switchedBWP.
 17. The base station of claim 16, wherein data transmission isstarted on the switched BWP from the slot of the PDSCH.
 18. The basestation of claim 16, wherein the slot of the PDSCH is identified basedon a slot offset indicated by the DCI.
 19. The base station of claim 16,wherein the controller is configured to transmit, to the terminal,information on BWPs, and wherein the indicator indicates one of the BWPsfor BWP switching.
 20. The base station of claim 16, wherein theswitched BWP is an activated BWP.